66932930 has 16 divisors (see below), whose sum is σ = 120983544. Its totient is φ = 26661120.

The previous prime is 66932923. The next prime is 66932939. The reversal of 66932930 is 3923966.

It can be written as a sum of positive squares in 4 ways, for example, as 62425801 + 4507129 = 7901^2 + 2123^2 .

It is not an unprimeable number, because it can be changed into a prime (66932939) 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, 11477 + ... + 16296.

Almost surely, 2^66932930 is an apocalyptic number.

66932930 is a deficient number, since it is larger than the sum of its proper divisors (54050614).

66932930 is a wasteful number, since it uses less digits than its factorization.

66932930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28021.

The product of its (nonzero) digits is 52488, while the sum is 38.

The square root of 66932930 is about 8181.2547937343. The cubic root of 66932930 is about 406.0192384131.

The spelling of 66932930 in words is "sixty-six million, nine hundred thirty-two thousand, nine hundred thirty".