664073507 has 2 divisors, whose sum is σ = 664073508. Its totient is φ = 664073506.

The previous prime is 664073483. The next prime is 664073513. The reversal of 664073507 is 705370466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 664073507 - 2⁸ = 664073251 is a prime.

It is a super-3 number, since 3×664073507³ (a number of 27 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (664073587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332036753 + 332036754.

It is an arithmetic number, because the mean of its divisors is an integer number (332036754).

Almost surely, 2^664073507 is an apocalyptic number.

664073507 is a deficient number, since it is larger than the sum of its proper divisors (1).

664073507 is an equidigital number, since it uses as much as digits as its factorization.

664073507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105840, while the sum is 38.

The square root of 664073507 is about 25769.6237263954. The cubic root of 664073507 is about 872.4463261481.

The spelling of 664073507 in words is "six hundred sixty-four million, seventy-three thousand, five hundred seven".