5656236661 has 4 divisors (see below), whose sum is σ = 5664017632. Its totient is φ = 5648455692.

The previous prime is 5656236637. The next prime is 5656236683. The reversal of 5656236661 is 1666326565.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5656236661 - 2¹⁵ = 5656203893 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 (5656230661) 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, 3889395 + ... + 3890848.

It is an arithmetic number, because the mean of its divisors is an integer number (1416004408).

Almost surely, 2^5656236661 is an apocalyptic number.

It is an amenable number.

5656236661 is a deficient number, since it is larger than the sum of its proper divisors (7780971).

5656236661 is an equidigital number, since it uses as much as digits as its factorization.

5656236661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7780970.

The product of its digits is 1166400, while the sum is 46.

The square root of 5656236661 is about 75207.9561017317. The cubic root of 5656236661 is about 1781.7325911923.

The spelling of 5656236661 in words is "five billion, six hundred fifty-six million, two hundred thirty-six thousand, six hundred sixty-one".