664462402651 has 2 divisors, whose sum is σ = 664462402652. Its totient is φ = 664462402650.

The previous prime is 664462402613. The next prime is 664462402687. The reversal of 664462402651 is 156204264466.

It is a happy number.

664462402651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 664462402651 - 2⁷ = 664462402523 is a prime.

It is not a weakly prime, because it can be changed into another prime (664462492651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332231201325 + 332231201326.

It is an arithmetic number, because the mean of its divisors is an integer number (332231201326).

Almost surely, 2^664462402651 is an apocalyptic number.

664462402651 is a deficient number, since it is larger than the sum of its proper divisors (1).

664462402651 is an equidigital number, since it uses as much as digits as its factorization.

664462402651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1658880, while the sum is 46.

The spelling of 664462402651 in words is "six hundred sixty-four billion, four hundred sixty-two million, four hundred two thousand, six hundred fifty-one".