664269607 has 2 divisors, whose sum is σ = 664269608. Its totient is φ = 664269606.

The previous prime is 664269553. The next prime is 664269629. The reversal of 664269607 is 706962466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 664269607 - 2⁷ = 664269479 is a prime.

It is a super-2 number, since 2×664269607² = 882508221567868898, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664269637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332134803 + 332134804.

It is an arithmetic number, because the mean of its divisors is an integer number (332134804).

Almost surely, 2^664269607 is an apocalyptic number.

664269607 is a deficient number, since it is larger than the sum of its proper divisors (1).

664269607 is an equidigital number, since it uses as much as digits as its factorization.

664269607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 653184, while the sum is 46.

The square root of 664269607 is about 25773.4283128962. The cubic root of 664269607 is about 872.5321950994.

The spelling of 664269607 in words is "six hundred sixty-four million, two hundred sixty-nine thousand, six hundred seven".