66579671120 has 80 divisors (see below), whose sum is σ = 155892522240. Its totient is φ = 26443832832.

The previous prime is 66579671117. The next prime is 66579671189. The reversal of 66579671120 is 2117697566.

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

It is a congruent number.

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, 21344921 + ... + 21348039.

It is an arithmetic number, because the mean of its divisors is an integer number (1948656528).

Almost surely, 2^66579671120 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66579671120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77946261120).

66579671120 is an abundant number, since it is smaller than the sum of its proper divisors (89312851120).

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

66579671120 is a wasteful number, since it uses less digits than its factorization.

66579671120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4932 (or 4926 counting only the distinct ones).

The product of its (nonzero) digits is 952560, while the sum is 50.

The spelling of 66579671120 in words is "sixty-six billion, five hundred seventy-nine million, six hundred seventy-one thousand, one hundred twenty".