66515364 has 24 divisors (see below), whose sum is σ = 172447520. Its totient is φ = 22171752.

The previous prime is 66515359. The next prime is 66515369. The reversal of 66515364 is 46351566.

It is an interprime number because it is at equal distance from previous prime (66515359) and next prime (66515369).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (66515369) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 307834 + ... + 308049.

Almost surely, 2^66515364 is an apocalyptic number.

It is an amenable number.

66515364 is an abundant number, since it is smaller than the sum of its proper divisors (105932156).

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

66515364 is a wasteful number, since it uses less digits than its factorization.

66515364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615896 (or 615888 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 66515364 is about 8155.6951880266. The cubic root of 66515364 is about 405.1731495568.

The spelling of 66515364 in words is "sixty-six million, five hundred fifteen thousand, three hundred sixty-four".