660066066666 has 24 divisors (see below), whose sum is σ = 1483111410144. Its totient is φ = 220022022060.

The previous prime is 660066066661. The next prime is 660066066677. The reversal of 660066066666 is 666660660066.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (660066066661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 679079830 + ... + 679080801.

It is an arithmetic number, because the mean of its divisors is an integer number (61796308756).

Almost surely, 2^660066066666 is an apocalyptic number.

660066066666 is an abundant number, since it is smaller than the sum of its proper divisors (823045343478).

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

660066066666 is a wasteful number, since it uses less digits than its factorization.

660066066666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1358160648 (or 1358160636 counting only the distinct ones).

The product of its (nonzero) digits is 10077696, while the sum is 54.

The spelling of 660066066666 in words is "six hundred sixty billion, sixty-six million, sixty-six thousand, six hundred sixty-six".