66565113 has 16 divisors (see below), whose sum is σ = 95416320. Its totient is φ = 41144976.

The previous prime is 66565111. The next prime is 66565117. The reversal of 66565113 is 31156566.

It is not a de Polignac number, because 66565113 - 2¹ = 66565111 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66565111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9745 + ... + 15102.

It is an arithmetic number, because the mean of its divisors is an integer number (5963520).

Almost surely, 2^66565113 is an apocalyptic number.

It is an amenable number.

66565113 is a deficient number, since it is larger than the sum of its proper divisors (28851207).

66565113 is a wasteful number, since it uses less digits than its factorization.

66565113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24916.

The product of its digits is 16200, while the sum is 33.

The square root of 66565113 is about 8158.7445725430. The cubic root of 66565113 is about 405.2741384339.

The spelling of 66565113 in words is "sixty-six million, five hundred sixty-five thousand, one hundred thirteen".