66765017 has 12 divisors (see below), whose sum is σ = 73652208. Its totient is φ = 60475800.

The previous prime is 66765011. The next prime is 66765029. The reversal of 66765017 is 71056766.

It is not a de Polignac number, because 66765017 - 2²² = 62570713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66765011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39218 + ... + 40884.

It is an arithmetic number, because the mean of its divisors is an integer number (6137684).

Almost surely, 2^66765017 is an apocalyptic number.

It is an amenable number.

66765017 is a deficient number, since it is larger than the sum of its proper divisors (6887191).

66765017 is a wasteful number, since it uses less digits than its factorization.

66765017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2020 (or 2009 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 66765017 is about 8170.9862929759. The cubic root of 66765017 is about 405.6794305966.

The spelling of 66765017 in words is "sixty-six million, seven hundred sixty-five thousand, seventeen".