66488620 has 24 divisors (see below), whose sum is σ = 152319888. Its totient is φ = 24177600.

The previous prime is 66488573. The next prime is 66488627. The reversal of 66488620 is 2688466.

It is not an unprimeable number, because it can be changed into a prime (66488627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150891 + ... + 151330.

It is an arithmetic number, because the mean of its divisors is an integer number (6346662).

Almost surely, 2^66488620 is an apocalyptic number.

It is an amenable number.

66488620 is an abundant number, since it is smaller than the sum of its proper divisors (85831268).

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

66488620 is a wasteful number, since it uses less digits than its factorization.

66488620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302241 (or 302239 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 40.

The square root of 66488620 is about 8154.0554327279. The cubic root of 66488620 is about 405.1188392809.

The spelling of 66488620 in words is "sixty-six million, four hundred eighty-eight thousand, six hundred twenty".