66170600080 has 80 divisors (see below), whose sum is σ = 175426990704. Its totient is φ = 22995025920.

The previous prime is 66170600077. The next prime is 66170600129. The reversal of 66170600080 is 8000607166.

It can be written as a sum of positive squares in 8 ways, for example, as 673506304 + 65497093776 = 25952^2 + 255924^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (34).

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, 1853661 + ... + 1889020.

Almost surely, 2^66170600080 is an apocalyptic number.

It is an amenable number.

66170600080 is an abundant number, since it is smaller than the sum of its proper divisors (109256390624).

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

66170600080 is a wasteful number, since it uses less digits than its factorization.

66170600080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3742724 (or 3742718 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The spelling of 66170600080 in words is "sixty-six billion, one hundred seventy million, six hundred thousand, eighty".