66628460 has 12 divisors (see below), whose sum is σ = 139919808. Its totient is φ = 26651376.

The previous prime is 66628451. The next prime is 66628481. The reversal of 66628460 is 6482666.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1665692 + ... + 1665731.

It is an arithmetic number, because the mean of its divisors is an integer number (11659984).

Almost surely, 2^66628460 is an apocalyptic number.

It is an amenable number.

66628460 is an abundant number, since it is smaller than the sum of its proper divisors (73291348).

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

66628460 is a wasteful number, since it uses less digits than its factorization.

66628460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3331432 (or 3331430 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 66628460 is about 8162.6258030122. The cubic root of 66628460 is about 405.4026580146.

The spelling of 66628460 in words is "sixty-six million, six hundred twenty-eight thousand, four hundred sixty".