11656656166457 has 2 divisors, whose sum is σ = 11656656166458. Its totient is φ = 11656656166456.

The previous prime is 11656656166451. The next prime is 11656656166499. The reversal of 11656656166457 is 75466165665611.

11656656166457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11644057450921 + 12598715536 = 3412339^2 + 112244^2 .

It is a cyclic number.

It is not a de Polignac number, because 11656656166457 - 2²⁶ = 11656589057593 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11656656166393 and 11656656166402.

It is not a weakly prime, because it can be changed into another prime (11656656166451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5828328083228 + 5828328083229.

It is an arithmetic number, because the mean of its divisors is an integer number (5828328083229).

Almost surely, 2^{11656656166457} is an apocalyptic number.

It is an amenable number.

11656656166457 is a deficient number, since it is larger than the sum of its proper divisors (1).

11656656166457 is an equidigital number, since it uses as much as digits as its factorization.

11656656166457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296000, while the sum is 65.

The spelling of 11656656166457 in words is "eleven trillion, six hundred fifty-six billion, six hundred fifty-six million, one hundred sixty-six thousand, four hundred fifty-seven".