5656656655687 has 2 divisors, whose sum is σ = 5656656655688. Its totient is φ = 5656656655686.

The previous prime is 5656656655651. The next prime is 5656656655717. The reversal of 5656656655687 is 7865566566565.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5656656655687 - 2¹⁵ = 5656656622919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5656656655087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2828328327843 + 2828328327844.

It is an arithmetic number, because the mean of its divisors is an integer number (2828328327844).

Almost surely, 2^{5656656655687} is an apocalyptic number.

5656656655687 is a deficient number, since it is larger than the sum of its proper divisors (1).

5656656655687 is an equidigital number, since it uses as much as digits as its factorization.

5656656655687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8164800000, while the sum is 76.

The spelling of 5656656655687 in words is "five trillion, six hundred fifty-six billion, six hundred fifty-six million, six hundred fifty-five thousand, six hundred eighty-seven".