66733290 has 48 divisors (see below), whose sum is σ = 186856488. Its totient is φ = 16426368.

The previous prime is 66733267. The next prime is 66733309. The reversal of 66733290 is 9233766.

It can be written as a sum of positive squares in 4 ways, for example, as 24235929 + 42497361 = 4923^2 + 6519^2 .

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 an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27349 + ... + 29688.

Almost surely, 2^66733290 is an apocalyptic number.

66733290 is an abundant number, since it is smaller than the sum of its proper divisors (120123198).

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

66733290 is a wasteful number, since it uses less digits than its factorization.

66733290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57063 (or 57060 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 36.

The square root of 66733290 is about 8169.0446197827. The cubic root of 66733290 is about 405.6151602587.

The spelling of 66733290 in words is "sixty-six million, seven hundred thirty-three thousand, two hundred ninety".