866577640112423 has 2 divisors, whose sum is σ = 866577640112424. Its totient is φ = 866577640112422.

The previous prime is 866577640112323. The next prime is 866577640112441. The reversal of 866577640112423 is 324211046775668.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 866577640112423 - 2²⁸ = 866577371676967 is a prime.

It is a super-2 number, since 2×866577640112423² (a number of 31 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (866577640112453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433288820056211 + 433288820056212.

It is an arithmetic number, because the mean of its divisors is an integer number (433288820056212).

Almost surely, 2^{866577640112423} is an apocalyptic number.

866577640112423 is a deficient number, since it is larger than the sum of its proper divisors (1).

866577640112423 is an equidigital number, since it uses as much as digits as its factorization.

866577640112423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81285120, while the sum is 62.

The spelling of 866577640112423 in words is "eight hundred sixty-six trillion, five hundred seventy-seven billion, six hundred forty million, one hundred twelve thousand, four hundred twenty-three".