664486967 has 2 divisors, whose sum is σ = 664486968. Its totient is φ = 664486966.

The previous prime is 664486931. The next prime is 664486993. The reversal of 664486967 is 769684466.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-664486967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664486567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332243483 + 332243484.

It is an arithmetic number, because the mean of its divisors is an integer number (332243484).

Almost surely, 2^664486967 is an apocalyptic number.

664486967 is a deficient number, since it is larger than the sum of its proper divisors (1).

664486967 is an equidigital number, since it uses as much as digits as its factorization.

664486967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10450944, while the sum is 56.

The square root of 664486967 is about 25777.6447139765. The cubic root of 664486967 is about 872.6273537086.

The spelling of 664486967 in words is "six hundred sixty-four million, four hundred eighty-six thousand, nine hundred sixty-seven".