3561660 has 72 divisors (see below), whose sum is σ = 11059776. Its totient is φ = 927360.

The previous prime is 3561659. The next prime is 3561661. The reversal of 3561660 is 661653.

3561660 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3561659) and next prime (3561661).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3561661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8250 + ... + 8670.

It is an arithmetic number, because the mean of its divisors is an integer number (153608).

Almost surely, 2^3561660 is an apocalyptic number.

3561660 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3561660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5529888).

3561660 is an abundant number, since it is smaller than the sum of its proper divisors (7498116).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3561660 is a wasteful number, since it uses less digits than its factorization.

3561660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483 (or 478 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 3561660 is about 1887.2360742631. The cubic root of 3561660 is about 152.7158637891.

It can be divided in two parts, 356 and 1660, that added together give a triangular number (2016 = T₆₃).

The spelling of 3561660 in words is "three million, five hundred sixty-one thousand, six hundred sixty".