664074067 has 2 divisors, whose sum is σ = 664074068. Its totient is φ = 664074066.

The previous prime is 664074049. The next prime is 664074071. The reversal of 664074067 is 760470466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 664074067 - 2⁷ = 664073939 is a prime.

It is not a weakly prime, because it can be changed into another prime (664074017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332037033 + 332037034.

It is an arithmetic number, because the mean of its divisors is an integer number (332037034).

Almost surely, 2^664074067 is an apocalyptic number.

664074067 is a deficient number, since it is larger than the sum of its proper divisors (1).

664074067 is an equidigital number, since it uses as much as digits as its factorization.

664074067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 40.

The square root of 664074067 is about 25769.6345918990. The cubic root of 664074067 is about 872.4465713870.

The spelling of 664074067 in words is "six hundred sixty-four million, seventy-four thousand, sixty-seven".