56662456661 has 4 divisors (see below), whose sum is σ = 56728420800. Its totient is φ = 56596492524.

The previous prime is 56662456651. The next prime is 56662456681. The reversal of 56662456661 is 16665426665.

56662456661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 56662456661 - 2¹⁰ = 56662455637 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 (56662456651) 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, 32980781 + ... + 32982498.

It is an arithmetic number, because the mean of its divisors is an integer number (14182105200).

Almost surely, 2^56662456661 is an apocalyptic number.

It is an amenable number.

56662456661 is a deficient number, since it is larger than the sum of its proper divisors (65964139).

56662456661 is an equidigital number, since it uses as much as digits as its factorization.

56662456661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65964138.

The product of its digits is 9331200, while the sum is 53.

The spelling of 56662456661 in words is "fifty-six billion, six hundred sixty-two million, four hundred fifty-six thousand, six hundred sixty-one".