23666877961 has 2 divisors, whose sum is σ = 23666877962. Its totient is φ = 23666877960.

The previous prime is 23666877937. The next prime is 23666877977. The reversal of 23666877961 is 16977866632.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12632636025 + 11034241936 = 112395^2 + 105044^2 .

It is a cyclic number.

It is not a de Polignac number, because 23666877961 - 2⁵ = 23666877929 is a prime.

It is a super-2 number, since 2×23666877961² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23666877961.

It is not a weakly prime, because it can be changed into another prime (23666877901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11833438980 + 11833438981.

It is an arithmetic number, because the mean of its divisors is an integer number (11833438981).

Almost surely, 2^23666877961 is an apocalyptic number.

It is an amenable number.

23666877961 is a deficient number, since it is larger than the sum of its proper divisors (1).

23666877961 is an equidigital number, since it uses as much as digits as its factorization.

23666877961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27433728, while the sum is 61.

The spelling of 23666877961 in words is "twenty-three billion, six hundred sixty-six million, eight hundred seventy-seven thousand, nine hundred sixty-one".