660716826066 has 64 divisors (see below), whose sum is σ = 1601854531200. Its totient is φ = 200202624000.

The previous prime is 660716826047. The next prime is 660716826071. The reversal of 660716826066 is 660628617066.

660716826066 is a `hidden beast` number, since 6 + 607 + 1 + 6 + 8 + 26 + 0 + 6 + 6 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10356666 + ... + 10420266.

It is an arithmetic number, because the mean of its divisors is an integer number (25028977050).

Almost surely, 2^660716826066 is an apocalyptic number.

660716826066 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

660716826066 is an abundant number, since it is smaller than the sum of its proper divisors (941137705134).

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

660716826066 is a wasteful number, since it uses less digits than its factorization.

660716826066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81112 (or 81106 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 54.

The spelling of 660716826066 in words is "six hundred sixty billion, seven hundred sixteen million, eight hundred twenty-six thousand, sixty-six".