66126120512 has 14 divisors (see below), whose sum is σ = 131219020518. Its totient is φ = 33063060224.

The previous prime is 66126120509. The next prime is 66126120547. The reversal of 66126120512 is 21502162166.

It can be written as a sum of positive squares in only one way, i.e., 65523712576 + 602407936 = 255976^2 + 24544^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 516610253 + ... + 516610380.

Almost surely, 2^66126120512 is an apocalyptic number.

It is an amenable number.

66126120512 is a deficient number, since it is larger than the sum of its proper divisors (65092900006).

66126120512 is a wasteful number, since it uses less digits than its factorization.

66126120512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033220645 (or 1033220635 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

Adding to 66126120512 its reverse (21502162166), we get a palindrome (87628282678).

The spelling of 66126120512 in words is "sixty-six billion, one hundred twenty-six million, one hundred twenty thousand, five hundred twelve".