5181660 has 72 divisors (see below), whose sum is σ = 17153136. Its totient is φ = 1255680.

The previous prime is 5181653. The next prime is 5181667. The reversal of 5181660 is 661815.

5181660 = 125² + 126² + ... + 259².

It is an interprime number because it is at equal distance from previous prime (5181653) and next prime (5181667).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5181667) 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, 672 + ... + 3288.

It is an arithmetic number, because the mean of its divisors is an integer number (238238).

Almost surely, 2^5181660 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 5181660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8576568).

5181660 is an abundant number, since it is smaller than the sum of its proper divisors (11971476).

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

5181660 is a wasteful number, since it uses less digits than its factorization.

5181660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2643 (or 2638 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 5181660 is about 2276.3259871995. The cubic root of 5181660 is about 173.0439039005.

The spelling of 5181660 in words is "five million, one hundred eighty-one thousand, six hundred sixty".