66530056 has 16 divisors (see below), whose sum is σ = 124831440. Its totient is φ = 33241680.

The previous prime is 66530047. The next prime is 66530071. The reversal of 66530056 is 65003566.

It is a happy 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, 18051 + ... + 21421.

It is an arithmetic number, because the mean of its divisors is an integer number (7801965).

Almost surely, 2^66530056 is an apocalyptic number.

It is an amenable number.

66530056 is a deficient number, since it is larger than the sum of its proper divisors (58301384).

66530056 is a wasteful number, since it uses less digits than its factorization.

66530056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5844 (or 5840 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 66530056 is about 8156.5958585675. The cubic root of 66530056 is about 405.2029790845.

The spelling of 66530056 in words is "sixty-six million, five hundred thirty thousand, fifty-six".