15660021096 has 24 divisors (see below), whose sum is σ = 42412557330. Its totient is φ = 5220007008.

The previous prime is 15660021089. The next prime is 15660021173. The reversal of 15660021096 is 69012006651.

15660021096 is a `hidden beast` number, since 1 + 566 + 0 + 0 + 2 + 1 + 0 + 96 = 666.

It can be written as a sum of positive squares in only one way, i.e., 15546598596 + 113422500 = 124686^2 + 10650^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 15660021096.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 108750075 + ... + 108750218.

Almost surely, 2^15660021096 is an apocalyptic number.

It is an amenable number.

15660021096 is an abundant number, since it is smaller than the sum of its proper divisors (26752536234).

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

15660021096 is a wasteful number, since it uses less digits than its factorization.

15660021096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217500305 (or 217500298 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The spelling of 15660021096 in words is "fifteen billion, six hundred sixty million, twenty-one thousand, ninety-six".