66579097566 has 32 divisors (see below), whose sum is σ = 135791365248. Its totient is φ = 21758253920.

The previous prime is 66579097561. The next prime is 66579097597.

66579097566 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 66579097497 and 66579097506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66579097561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 445041 + ... + 575516.

It is an arithmetic number, because the mean of its divisors is an integer number (4243480164).

Almost surely, 2^66579097566 is an apocalyptic number.

66579097566 is an abundant number, since it is smaller than the sum of its proper divisors (69212267682).

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

66579097566 is a wasteful number, since it uses less digits than its factorization.

66579097566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020776.

The product of its (nonzero) digits is 128595600, while the sum is 66.

The spelling of 66579097566 in words is "sixty-six billion, five hundred seventy-nine million, ninety-seven thousand, five hundred sixty-six".