66630056 has 16 divisors (see below), whose sum is σ = 126980340. Its totient is φ = 32768640.

The previous prime is 66630037. The next prime is 66630059. The reversal of 66630056 is 65003666.

It can be written as a sum of positive squares in 2 ways, for example, as 64480900 + 2149156 = 8030^2 + 1466^2 .

It is not an unprimeable number, because it can be changed into a prime (66630059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67781 + ... + 68756.

Almost surely, 2^66630056 is an apocalyptic number.

It is an amenable number.

66630056 is a deficient number, since it is larger than the sum of its proper divisors (60350284).

66630056 is a wasteful number, since it uses less digits than its factorization.

66630056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136604 (or 136600 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 66630056 is about 8162.7235650854. The cubic root of 66630056 is about 405.4058949571.

The spelling of 66630056 in words is "sixty-six million, six hundred thirty thousand, fifty-six".