66516365 has 8 divisors (see below), whose sum is σ = 80394720. Its totient is φ = 52829712.

The previous prime is 66516349. The next prime is 66516371. The reversal of 66516365 is 56361566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66516365 - 2⁴ = 66516349 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47159 + ... + 48548.

It is an arithmetic number, because the mean of its divisors is an integer number (10049340).

Almost surely, 2^66516365 is an apocalyptic number.

It is an amenable number.

66516365 is a deficient number, since it is larger than the sum of its proper divisors (13878355).

66516365 is a wasteful number, since it uses less digits than its factorization.

66516365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95851.

The product of its digits is 97200, while the sum is 38.

The square root of 66516365 is about 8155.7565559548. The cubic root of 66516365 is about 405.1751820511.

The spelling of 66516365 in words is "sixty-six million, five hundred sixteen thousand, three hundred sixty-five".