664125079 has 2 divisors, whose sum is σ = 664125080. Its totient is φ = 664125078.

The previous prime is 664125073. The next prime is 664125097. The reversal of 664125079 is 970521466.

Together with next prime (664125097) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 664125079 - 2¹⁵ = 664092311 is a prime.

It is equal to p_34489471 and since 664125079 and 34489471 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664125073) 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, 332062539 + 332062540.

It is an arithmetic number, because the mean of its divisors is an integer number (332062540).

Almost surely, 2^664125079 is an apocalyptic number.

664125079 is a deficient number, since it is larger than the sum of its proper divisors (1).

664125079 is an equidigital number, since it uses as much as digits as its factorization.

664125079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 664125079 is about 25770.6243424563. The cubic root of 664125079 is about 872.4689103133.

The spelling of 664125079 in words is "six hundred sixty-four million, one hundred twenty-five thousand, seventy-nine".