66510110660 has 48 divisors (see below), whose sum is σ = 168025549440. Its totient is φ = 21603283200.

The previous prime is 66510110657. The next prime is 66510110687. The reversal of 66510110660 is 6601101566.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12499241 + ... + 12504560.

It is an arithmetic number, because the mean of its divisors is an integer number (3500532280).

Almost surely, 2^66510110660 is an apocalyptic number.

It is an amenable number.

66510110660 is an abundant number, since it is smaller than the sum of its proper divisors (101515438780).

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

66510110660 is a wasteful number, since it uses less digits than its factorization.

66510110660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25003836 (or 25003834 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The spelling of 66510110660 in words is "sixty-six billion, five hundred ten million, one hundred ten thousand, six hundred sixty".