66288668900 has 18 divisors (see below), whose sum is σ = 143846411730. Its totient is φ = 26515467520.

The previous prime is 66288668891. The next prime is 66288668933. The reversal of 66288668900 is 986688266.

It can be written as a sum of positive squares in 3 ways, for example, as 6200932516 + 60087736384 = 78746^2 + 245128^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 66288668900.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 331443245 + ... + 331443444.

Almost surely, 2^66288668900 is an apocalyptic number.

It is an amenable number.

66288668900 is an abundant number, since it is smaller than the sum of its proper divisors (77557742830).

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

66288668900 is a wasteful number, since it uses less digits than its factorization.

66288668900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662886703 (or 662886696 counting only the distinct ones).

The product of its (nonzero) digits is 11943936, while the sum is 59.

The spelling of 66288668900 in words is "sixty-six billion, two hundred eighty-eight million, six hundred sixty-eight thousand, nine hundred".