766617163544137 has 2 divisors, whose sum is σ = 766617163544138. Its totient is φ = 766617163544136.

The previous prime is 766617163544131. The next prime is 766617163544147. The reversal of 766617163544137 is 731445361716667.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 739866710641081 + 26750452903056 = 27200491^2 + 5172084^2 .

It is a cyclic number.

It is not a de Polignac number, because 766617163544137 - 2⁴³ = 757821070521929 is a prime.

It is not a weakly prime, because it can be changed into another prime (766617163544131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383308581772068 + 383308581772069.

It is an arithmetic number, because the mean of its divisors is an integer number (383308581772069).

Almost surely, 2^{766617163544137} is an apocalyptic number.

It is an amenable number.

766617163544137 is a deficient number, since it is larger than the sum of its proper divisors (1).

766617163544137 is an equidigital number, since it uses as much as digits as its factorization.

766617163544137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 320060160, while the sum is 67.

The spelling of 766617163544137 in words is "seven hundred sixty-six trillion, six hundred seventeen billion, one hundred sixty-three million, five hundred forty-four thousand, one hundred thirty-seven".