3660644944 has 120 divisors (see below), whose sum is σ = 8150181480. Its totient is φ = 1589575680.

The previous prime is 3660644941. The next prime is 3660644983. The reversal of 3660644944 is 4494460663.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 635644944 + 3025000000 = 25212^2 + 55000^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3660644894 and 3660644903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3660644941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6343984 + ... + 6344560.

It is an arithmetic number, because the mean of its divisors is an integer number (67918179).

Almost surely, 2^3660644944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3660644944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4075090740).

3660644944 is an abundant number, since it is smaller than the sum of its proper divisors (4489536536).

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

3660644944 is a wasteful number, since it uses less digits than its factorization.

3660644944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749 (or 732 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 46.

The square root of 3660644944 is about 60503.2639119577. The cubic root of 3660644944 is about 1541.1770592995.

The spelling of 3660644944 in words is "three billion, six hundred sixty million, six hundred forty-four thousand, nine hundred forty-four".