66907583 has 2 divisors, whose sum is σ = 66907584. Its totient is φ = 66907582.

The previous prime is 66907573. The next prime is 66907609. The reversal of 66907583 is 38570966.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66907583 - 2⁴ = 66907567 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66907513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33453791 + 33453792.

It is an arithmetic number, because the mean of its divisors is an integer number (33453792).

Almost surely, 2^66907583 is an apocalyptic number.

66907583 is a deficient number, since it is larger than the sum of its proper divisors (1).

66907583 is an equidigital number, since it uses as much as digits as its factorization.

66907583 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 66907583 is about 8179.7055570479. The cubic root of 66907583 is about 405.9679797925.

The spelling of 66907583 in words is "sixty-six million, nine hundred seven thousand, five hundred eighty-three".