66312959 has 2 divisors, whose sum is σ = 66312960. Its totient is φ = 66312958.

The previous prime is 66312947. The next prime is 66312977. The reversal of 66312959 is 95921366.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66312959 - 2²⁰ = 65264383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66312919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33156479 + 33156480.

It is an arithmetic number, because the mean of its divisors is an integer number (33156480).

Almost surely, 2^66312959 is an apocalyptic number.

66312959 is a deficient number, since it is larger than the sum of its proper divisors (1).

66312959 is an equidigital number, since it uses as much as digits as its factorization.

66312959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87480, while the sum is 41.

The square root of 66312959 is about 8143.2769202576. The cubic root of 66312959 is about 404.7617538966.

The spelling of 66312959 in words is "sixty-six million, three hundred twelve thousand, nine hundred fifty-nine".