64664477167 has 2 divisors, whose sum is σ = 64664477168. Its totient is φ = 64664477166.

The previous prime is 64664477117. The next prime is 64664477173. The reversal of 64664477167 is 76177446646.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64664477167 - 2²⁷ = 64530259439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64664477117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32332238583 + 32332238584.

It is an arithmetic number, because the mean of its divisors is an integer number (32332238584).

Almost surely, 2^64664477167 is an apocalyptic number.

64664477167 is a deficient number, since it is larger than the sum of its proper divisors (1).

64664477167 is an equidigital number, since it uses as much as digits as its factorization.

64664477167 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28449792, while the sum is 58.

The spelling of 64664477167 in words is "sixty-four billion, six hundred sixty-four million, four hundred seventy-seven thousand, one hundred sixty-seven".