66675620 has 48 divisors (see below), whose sum is σ = 159401088. Its totient is φ = 23189760.

The previous prime is 66675613. The next prime is 66675629. The reversal of 66675620 is 2657666.

It is not an unprimeable number, because it can be changed into a prime (66675629) 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, 1529 + ... + 11648.

It is an arithmetic number, because the mean of its divisors is an integer number (3320856).

Almost surely, 2^66675620 is an apocalyptic number.

It is an amenable number.

66675620 is an abundant number, since it is smaller than the sum of its proper divisors (92725468).

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

66675620 is a wasteful number, since it uses less digits than its factorization.

66675620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13220 (or 13218 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 66675620 is about 8165.5140683242. The cubic root of 66675620 is about 405.4982842196.

The spelling of 66675620 in words is "sixty-six million, six hundred seventy-five thousand, six hundred twenty".