66632664 has 32 divisors (see below), whose sum is σ = 190379520. Its totient is φ = 19037856.

The previous prime is 66632663. The next prime is 66632669. The reversal of 66632664 is 46623666.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66632663) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 198144 + ... + 198479.

It is an arithmetic number, because the mean of its divisors is an integer number (5949360).

Almost surely, 2^66632664 is an apocalyptic number.

It is an amenable number.

66632664 is an abundant number, since it is smaller than the sum of its proper divisors (123746856).

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

66632664 is a wasteful number, since it uses less digits than its factorization.

66632664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396639 (or 396635 counting only the distinct ones).

The product of its digits is 186624, while the sum is 39.

The square root of 66632664 is about 8162.8833141238. The cubic root of 66632664 is about 405.4111842857.

The spelling of 66632664 in words is "sixty-six million, six hundred thirty-two thousand, six hundred sixty-four".