664670943499 has 2 divisors, whose sum is σ = 664670943500. Its totient is φ = 664670943498.

The previous prime is 664670943457. The next prime is 664670943523. The reversal of 664670943499 is 994349076466.

664670943499 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 664670943499 - 2²⁵ = 664637389067 is a prime.

It is not a weakly prime, because it can be changed into another prime (664670943799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332335471749 + 332335471750.

It is an arithmetic number, because the mean of its divisors is an integer number (332335471750).

Almost surely, 2^664670943499 is an apocalyptic number.

664670943499 is a deficient number, since it is larger than the sum of its proper divisors (1).

664670943499 is an equidigital number, since it uses as much as digits as its factorization.

664670943499 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211631616, while the sum is 67.

The spelling of 664670943499 in words is "six hundred sixty-four billion, six hundred seventy million, nine hundred forty-three thousand, four hundred ninety-nine".