664425007 has 2 divisors, whose sum is σ = 664425008. Its totient is φ = 664425006.

The previous prime is 664424977. The next prime is 664425017. The reversal of 664425007 is 700524466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 664425007 - 2⁷ = 664424879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664425017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332212503 + 332212504.

It is an arithmetic number, because the mean of its divisors is an integer number (332212504).

Almost surely, 2^664425007 is an apocalyptic number.

664425007 is a deficient number, since it is larger than the sum of its proper divisors (1).

664425007 is an equidigital number, since it uses as much as digits as its factorization.

664425007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 34.

The square root of 664425007 is about 25776.4428694108. The cubic root of 664425007 is about 872.6002301911.

The spelling of 664425007 in words is "six hundred sixty-four million, four hundred twenty-five thousand, seven".