664860877027 has 2 divisors, whose sum is σ = 664860877028. Its totient is φ = 664860877026.

The previous prime is 664860877007. The next prime is 664860877033. The reversal of 664860877027 is 720778068466.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-664860877027 is a prime.

It is a super-2 number, since 2×664860877027² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (664860877007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332430438513 + 332430438514.

It is an arithmetic number, because the mean of its divisors is an integer number (332430438514).

Almost surely, 2^664860877027 is an apocalyptic number.

664860877027 is a deficient number, since it is larger than the sum of its proper divisors (1).

664860877027 is an equidigital number, since it uses as much as digits as its factorization.

664860877027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37933056, while the sum is 61.

The spelling of 664860877027 in words is "six hundred sixty-four billion, eight hundred sixty million, eight hundred seventy-seven thousand, twenty-seven".