66651204 has 24 divisors (see below), whose sum is σ = 159137440. Its totient is φ = 21700224.

The previous prime is 66651119. The next prime is 66651253. The reversal of 66651204 is 40215666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64069 + ... + 65100.

Almost surely, 2^66651204 is an apocalyptic number.

It is an amenable number.

66651204 is an abundant number, since it is smaller than the sum of its proper divisors (92486236).

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

66651204 is a wasteful number, since it uses less digits than its factorization.

66651204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129219 (or 129217 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 66651204 is about 8164.0188632805. The cubic root of 66651204 is about 405.4487815935.

The spelling of 66651204 in words is "sixty-six million, six hundred fifty-one thousand, two hundred four".