664325029 has 2 divisors, whose sum is σ = 664325030. Its totient is φ = 664325028.

The previous prime is 664325023. The next prime is 664325041. The reversal of 664325029 is 920523466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 585736804 + 78588225 = 24202^2 + 8865^2 .

It is a cyclic number.

It is not a de Polignac number, because 664325029 - 2¹⁵ = 664292261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664325023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332162514 + 332162515.

It is an arithmetic number, because the mean of its divisors is an integer number (332162515).

Almost surely, 2^664325029 is an apocalyptic number.

It is an amenable number.

664325029 is a deficient number, since it is larger than the sum of its proper divisors (1).

664325029 is an equidigital number, since it uses as much as digits as its factorization.

664325029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 664325029 is about 25774.5034675743. The cubic root of 664325029 is about 872.5564604147.

The spelling of 664325029 in words is "six hundred sixty-four million, three hundred twenty-five thousand, twenty-nine".