66810232 has 16 divisors (see below), whose sum is σ = 131862600. Its totient is φ = 31646880.

The previous prime is 66810223. The next prime is 66810241. The reversal of 66810232 is 23201866.

It is an interprime number because it is at equal distance from previous prime (66810223) and next prime (66810241).

It is a self number, because there is not a number n which added to its sum of digits gives 66810232.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219619 + ... + 219922.

Almost surely, 2^66810232 is an apocalyptic number.

It is an amenable number.

66810232 is a deficient number, since it is larger than the sum of its proper divisors (65052368).

66810232 is a wasteful number, since it uses less digits than its factorization.

66810232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439566 (or 439562 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 66810232 is about 8173.7526265480. The cubic root of 66810232 is about 405.7709888063.

The spelling of 66810232 in words is "sixty-six million, eight hundred ten thousand, two hundred thirty-two".