66125512 has 48 divisors (see below), whose sum is σ = 135442260. Its totient is φ = 30237696.

The previous prime is 66125459. The next prime is 66125513. The reversal of 66125512 is 21552166.

It can be written as a sum of positive squares in 6 ways, for example, as 49364676 + 16760836 = 7026^2 + 4094^2 .

It is not an unprimeable number, because it can be changed into a prime (66125513) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85158 + ... + 85930.

Almost surely, 2^66125512 is an apocalyptic number.

It is an amenable number.

66125512 is an abundant number, since it is smaller than the sum of its proper divisors (69316748).

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

66125512 is a wasteful number, since it uses less digits than its factorization.

66125512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850 (or 829 counting only the distinct ones).

The product of its digits is 3600, while the sum is 28.

The square root of 66125512 is about 8131.7594652080. The cubic root of 66125512 is about 404.3800136420.

Adding to 66125512 its reverse (21552166), we get a palindrome (87677678).

The spelling of 66125512 in words is "sixty-six million, one hundred twenty-five thousand, five hundred twelve".