56797661 has 4 divisors (see below), whose sum is σ = 57086172. Its totient is φ = 56509152.

The previous prime is 56797651. The next prime is 56797679. The reversal of 56797661 is 16679765.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16679765 = 5 ⋅3335953.

It can be written as a sum of positive squares in 2 ways, for example, as 33709636 + 23088025 = 5806^2 + 4805^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56797661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56797621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143960 + ... + 144353.

It is an arithmetic number, because the mean of its divisors is an integer number (14271543).

Almost surely, 2^56797661 is an apocalyptic number.

It is an amenable number.

56797661 is a deficient number, since it is larger than the sum of its proper divisors (288511).

56797661 is a wasteful number, since it uses less digits than its factorization.

56797661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288510.

The product of its digits is 476280, while the sum is 47.

The square root of 56797661 is about 7536.4222944312. The cubic root of 56797661 is about 384.3941920133.

The spelling of 56797661 in words is "fifty-six million, seven hundred ninety-seven thousand, six hundred sixty-one".