66632620 has 24 divisors (see below), whose sum is σ = 147294000. Its totient is φ = 25250112.

The previous prime is 66632611. The next prime is 66632659. The reversal of 66632620 is 2623666.

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 7 ways as a sum of consecutive naturals, for example, 87295 + ... + 88054.

It is an arithmetic number, because the mean of its divisors is an integer number (6137250).

Almost surely, 2^66632620 is an apocalyptic number.

It is an amenable number.

66632620 is an abundant number, since it is smaller than the sum of its proper divisors (80661380).

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

66632620 is a wasteful number, since it uses less digits than its factorization.

66632620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175377 (or 175375 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 66632620 is about 8162.8806189972. The cubic root of 66632620 is about 405.4110950497.

The spelling of 66632620 in words is "sixty-six million, six hundred thirty-two thousand, six hundred twenty".