664402699 has 2 divisors, whose sum is σ = 664402700. Its totient is φ = 664402698.

The previous prime is 664402691. The next prime is 664402727. The reversal of 664402699 is 996204466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 664402699 - 2³ = 664402691 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (664402691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332201349 + 332201350.

It is an arithmetic number, because the mean of its divisors is an integer number (332201350).

Almost surely, 2^664402699 is an apocalyptic number.

664402699 is a deficient number, since it is larger than the sum of its proper divisors (1).

664402699 is an equidigital number, since it uses as much as digits as its factorization.

664402699 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 559872, while the sum is 46.

The square root of 664402699 is about 25776.0101450942. The cubic root of 664402699 is about 872.5904642614.

The spelling of 664402699 in words is "six hundred sixty-four million, four hundred two thousand, six hundred ninety-nine".