66566059 has 6 divisors (see below), whose sum is σ = 77434044. Its totient is φ = 57056580.

The previous prime is 66566011. The next prime is 66566077. The reversal of 66566059 is 95066566.

It is not a de Polignac number, because 66566059 - 2⁹ = 66565547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66566099) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 679197 + ... + 679294.

It is an arithmetic number, because the mean of its divisors is an integer number (12905674).

Almost surely, 2^66566059 is an apocalyptic number.

66566059 is a deficient number, since it is larger than the sum of its proper divisors (10867985).

66566059 is a wasteful number, since it uses less digits than its factorization.

66566059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1358505 (or 1358498 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 43.

The square root of 66566059 is about 8158.8025469428. The cubic root of 66566059 is about 405.2760582960.

The spelling of 66566059 in words is "sixty-six million, five hundred sixty-six thousand, fifty-nine".