56688665 has 8 divisors (see below), whose sum is σ = 74210688. Its totient is φ = 41228080.

The previous prime is 56688637. The next prime is 56688673.

56688665 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 56688665 - 2¹⁰ = 56687641 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 515297 + ... + 515406.

It is an arithmetic number, because the mean of its divisors is an integer number (9276336).

Almost surely, 2^56688665 is an apocalyptic number.

56688665 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

56688665 is a deficient number, since it is larger than the sum of its proper divisors (17522023).

56688665 is a wasteful number, since it uses less digits than its factorization.

56688665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1030719.

The product of its digits is 2073600, while the sum is 50.

The square root of 56688665 is about 7529.1875391705. The cubic root of 56688665 is about 384.1481474994.

The spelling of 56688665 in words is "fifty-six million, six hundred eighty-eight thousand, six hundred sixty-five".