66624967 has 2 divisors, whose sum is σ = 66624968. Its totient is φ = 66624966.

The previous prime is 66624949. The next prime is 66625007. The reversal of 66624967 is 76942666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66624967 - 2⁷ = 66624839 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66624917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33312483 + 33312484.

It is an arithmetic number, because the mean of its divisors is an integer number (33312484).

Almost surely, 2^66624967 is an apocalyptic number.

66624967 is a deficient number, since it is larger than the sum of its proper divisors (1).

66624967 is an equidigital number, since it uses as much as digits as its factorization.

66624967 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 46.

The square root of 66624967 is about 8162.4118371962. The cubic root of 66624967 is about 405.3955734733.

The spelling of 66624967 in words is "sixty-six million, six hundred twenty-four thousand, nine hundred sixty-seven".