56090665 has 8 divisors (see below), whose sum is σ = 68950728. Its totient is φ = 43777920.

The previous prime is 56090647. The next prime is 56090681. The reversal of 56090665 is 56609065.

It is a happy number.

56090665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1212201 + 54878464 = 1101^2 + 7408^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-56090665 is a prime.

It is a Duffinian number.

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, 136602 + ... + 137011.

It is an arithmetic number, because the mean of its divisors is an integer number (8618841).

Almost surely, 2^56090665 is an apocalyptic number.

It is an amenable number.

56090665 is a deficient number, since it is larger than the sum of its proper divisors (12860063).

56090665 is a wasteful number, since it uses less digits than its factorization.

56090665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273659.

The product of its (nonzero) digits is 48600, while the sum is 37.

The square root of 56090665 is about 7489.3701337295. The cubic root of 56090665 is about 382.7925965440.

Subtracting 56090665 from its reverse (56609065), we obtain a square (518400 = 720²).

The spelling of 56090665 in words is "fifty-six million, ninety thousand, six hundred sixty-five".