66316525 has 24 divisors (see below), whose sum is σ = 90172800. Its totient is φ = 47980800.

The previous prime is 66316513. The next prime is 66316529. The reversal of 66316525 is 52561366.

It is not a de Polignac number, because 66316525 - 2⁵ = 66316493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66316529) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65221 + ... + 66229.

It is an arithmetic number, because the mean of its divisors is an integer number (3757200).

Almost surely, 2^66316525 is an apocalyptic number.

It is an amenable number.

66316525 is a deficient number, since it is larger than the sum of its proper divisors (23856275).

66316525 is a wasteful number, since it uses less digits than its factorization.

66316525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1269 (or 1264 counting only the distinct ones).

The product of its digits is 32400, while the sum is 34.

The square root of 66316525 is about 8143.4958709390. The cubic root of 66316525 is about 404.7690091629.

The spelling of 66316525 in words is "sixty-six million, three hundred sixteen thousand, five hundred twenty-five".