66180040512 has 56 divisors (see below), whose sum is σ = 175285578816. Its totient is φ = 22036804608.

The previous prime is 66180040499. The next prime is 66180040547. The reversal of 66180040512 is 21504008166.

It is a super-2 number, since 2×66180040512² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2133 + ... + 363819.

Almost surely, 2^66180040512 is an apocalyptic number.

It is an amenable number.

66180040512 is an abundant number, since it is smaller than the sum of its proper divisors (109105538304).

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

66180040512 is a wasteful number, since it uses less digits than its factorization.

66180040512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362655 (or 362645 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

Adding to 66180040512 its reverse (21504008166), we get a palindrome (87684048678).

The spelling of 66180040512 in words is "sixty-six billion, one hundred eighty million, forty thousand, five hundred twelve".