56766510167681 has 2 divisors, whose sum is σ = 56766510167682. Its totient is φ = 56766510167680.

The previous prime is 56766510167617. The next prime is 56766510167693. The reversal of 56766510167681 is 18676101566765.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29667031095025 + 27099479072656 = 5446745^2 + 5205716^2 .

It is a cyclic number.

It is not a de Polignac number, because 56766510167681 - 2⁶ = 56766510167617 is a prime.

It is a super-2 number, since 2×56766510167681² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (56766512167681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28383255083840 + 28383255083841.

It is an arithmetic number, because the mean of its divisors is an integer number (28383255083841).

Almost surely, 2^{56766510167681} is an apocalyptic number.

It is an amenable number.

56766510167681 is a deficient number, since it is larger than the sum of its proper divisors (1).

56766510167681 is an equidigital number, since it uses as much as digits as its factorization.

56766510167681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 76204800, while the sum is 65.

The spelling of 56766510167681 in words is "fifty-six trillion, seven hundred sixty-six billion, five hundred ten million, one hundred sixty-seven thousand, six hundred eighty-one".