66226525 has 24 divisors (see below), whose sum is σ = 84637440. Its totient is φ = 51380160.

The previous prime is 66226487. The next prime is 66226529. The reversal of 66226525 is 52562266.

It is not a de Polignac number, because 66226525 - 2²⁵ = 32672093 is a prime.

It is a super-2 number, since 2×66226525² = 8771905227151250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66226529) 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, 184296 + ... + 184654.

It is an arithmetic number, because the mean of its divisors is an integer number (3526560).

Almost surely, 2^66226525 is an apocalyptic number.

It is an amenable number.

66226525 is a deficient number, since it is larger than the sum of its proper divisors (18410915).

66226525 is a wasteful number, since it uses less digits than its factorization.

66226525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573 (or 568 counting only the distinct ones).

The product of its digits is 43200, while the sum is 34.

The square root of 66226525 is about 8137.9681124959. The cubic root of 66226525 is about 404.5858185079.

The spelling of 66226525 in words is "sixty-six million, two hundred twenty-six thousand, five hundred twenty-five".