656663651311 has 4 divisors (see below), whose sum is σ = 656670246400. Its totient is φ = 656657056224.

The previous prime is 656663651197. The next prime is 656663651323. The reversal of 656663651311 is 113156366656.

656663651311 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.

It is a cyclic number.

It is not a de Polignac number, because 656663651311 - 2¹⁷ = 656663520239 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 (656663651911) 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, 3145866 + ... + 3348103.

It is an arithmetic number, because the mean of its divisors is an integer number (164167561600).

Almost surely, 2^656663651311 is an apocalyptic number.

656663651311 is a deficient number, since it is larger than the sum of its proper divisors (6595089).

656663651311 is a wasteful number, since it uses less digits than its factorization.

656663651311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6595088.

The product of its digits is 1749600, while the sum is 49.

The spelling of 656663651311 in words is "six hundred fifty-six billion, six hundred sixty-three million, six hundred fifty-one thousand, three hundred eleven".