66566115 has 48 divisors (see below), whose sum is σ = 143859456. Its totient is φ = 27662400.

The previous prime is 66566099. The next prime is 66566131. The reversal of 66566115 is 51166566.

It is an interprime number because it is at equal distance from previous prime (66566099) and next prime (66566131).

It is not a de Polignac number, because 66566115 - 2⁴ = 66566099 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66566115.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6141 + ... + 13070.

It is an arithmetic number, because the mean of its divisors is an integer number (2997072).

Almost surely, 2^66566115 is an apocalyptic number.

66566115 is an abundant number, since it is smaller than the sum of its proper divisors (77293341).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66566115 is a wasteful number, since it uses less digits than its factorization.

66566115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19240 (or 19237 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 66566115 is about 8158.8059788182. The cubic root of 66566115 is about 405.2761719448.

The spelling of 66566115 in words is "sixty-six million, five hundred sixty-six thousand, one hundred fifteen".