66932290 has 32 divisors (see below), whose sum is σ = 125550000. Its totient is φ = 25659648.

The previous prime is 66932287. The next prime is 66932293. The reversal of 66932290 is 9223966.

It is an interprime number because it is at equal distance from previous prime (66932287) and next prime (66932293).

It can be written as a sum of positive squares in 8 ways, for example, as 11444689 + 55487601 = 3383^2 + 7449^2 .

It is not an unprimeable number, because it can be changed into a prime (66932293) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42436 + ... + 43984.

Almost surely, 2^66932290 is an apocalyptic number.

66932290 is a deficient number, since it is larger than the sum of its proper divisors (58617710).

66932290 is a wasteful number, since it uses less digits than its factorization.

66932290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1734.

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 66932290 is about 8181.2156798363. The cubic root of 66932290 is about 406.0179443160.

The spelling of 66932290 in words is "sixty-six million, nine hundred thirty-two thousand, two hundred ninety".