22661376877 has 2 divisors, whose sum is σ = 22661376878. Its totient is φ = 22661376876.

The previous prime is 22661376833. The next prime is 22661376889. The reversal of 22661376877 is 77867316622.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17975837476 + 4685539401 = 134074^2 + 68451^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22661376877 is a prime.

It is a super-2 number, since 2×22661376877² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22661376077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11330688438 + 11330688439.

It is an arithmetic number, because the mean of its divisors is an integer number (11330688439).

Almost surely, 2^22661376877 is an apocalyptic number.

It is an amenable number.

22661376877 is a deficient number, since it is larger than the sum of its proper divisors (1).

22661376877 is an equidigital number, since it uses as much as digits as its factorization.

22661376877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7112448, while the sum is 55.

The spelling of 22661376877 in words is "twenty-two billion, six hundred sixty-one million, three hundred seventy-six thousand, eight hundred seventy-seven".