66052615 has 4 divisors (see below), whose sum is σ = 79263144. Its totient is φ = 52842088.

The previous prime is 66052579. The next prime is 66052621. The reversal of 66052615 is 51625066.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66052615 - 2²³ = 57664007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6605257 + ... + 6605266.

It is an arithmetic number, because the mean of its divisors is an integer number (19815786).

Almost surely, 2^66052615 is an apocalyptic number.

66052615 is a deficient number, since it is larger than the sum of its proper divisors (13210529).

66052615 is a wasteful number, since it uses less digits than its factorization.

66052615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13210528.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 66052615 is about 8127.2759889154. The cubic root of 66052615 is about 404.2313623481.

The spelling of 66052615 in words is "sixty-six million, fifty-two thousand, six hundred fifteen".