66205017 has 12 divisors (see below), whose sum is σ = 99787584. Its totient is φ = 42217560.

The previous prime is 66204989. The next prime is 66205019. The reversal of 66205017 is 71050266.

It is not a de Polignac number, because 66205017 - 2²⁴ = 49427801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66205019) 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, 159709 + ... + 160122.

It is an arithmetic number, because the mean of its divisors is an integer number (8315632).

Almost surely, 2^66205017 is an apocalyptic number.

It is an amenable number.

66205017 is a deficient number, since it is larger than the sum of its proper divisors (33582567).

66205017 is a wasteful number, since it uses less digits than its factorization.

66205017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319860 (or 319857 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 66205017 is about 8136.6465451069. The cubic root of 66205017 is about 404.5420154448.

The spelling of 66205017 in words is "sixty-six million, two hundred five thousand, seventeen".