15660672 has 64 divisors (see below), whose sum is σ = 44064000. Its totient is φ = 4911104.

The previous prime is 15660661. The next prime is 15660691. The reversal of 15660672 is 27606651.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5329 + ... + 7727.

It is an arithmetic number, because the mean of its divisors is an integer number (688500).

Almost surely, 2^15660672 is an apocalyptic number.

15660672 is a gapful number since it is divisible by the number (12) 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 15660672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22032000).

15660672 is an abundant number, since it is smaller than the sum of its proper divisors (28403328).

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

15660672 is a wasteful number, since it uses less digits than its factorization.

15660672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2433 (or 2421 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 15660672 is about 3957.3566935519. The cubic root of 15660672 is about 250.1901060688.

The spelling of 15660672 in words is "fifteen million, six hundred sixty thousand, six hundred seventy-two".