56016600665 has 4 divisors (see below), whose sum is σ = 67219920804. Its totient is φ = 44813280528.

The previous prime is 56016600659. The next prime is 56016600677. The reversal of 56016600665 is 56600661065.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 33369059584 + 22647541081 = 182672^2 + 150491^2 .

It is a cyclic number.

It is not a de Polignac number, because 56016600665 - 2¹⁰ = 56016599641 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5601660062 + ... + 5601660071.

It is an arithmetic number, because the mean of its divisors is an integer number (16804980201).

Almost surely, 2^56016600665 is an apocalyptic number.

It is an amenable number.

56016600665 is a deficient number, since it is larger than the sum of its proper divisors (11203320139).

56016600665 is a wasteful number, since it uses less digits than its factorization.

56016600665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11203320138.

The product of its (nonzero) digits is 194400, while the sum is 41.

The spelling of 56016600665 in words is "fifty-six billion, sixteen million, six hundred thousand, six hundred sixty-five".