66313525 has 12 divisors (see below), whose sum is σ = 84142432. Its totient is φ = 51816240.

The previous prime is 66313501. The next prime is 66313537. The reversal of 66313525 is 52531366.

It is not a de Polignac number, because 66313525 - 2⁷ = 66313397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29769 + ... + 31918.

Almost surely, 2^66313525 is an apocalyptic number.

It is an amenable number.

66313525 is a deficient number, since it is larger than the sum of its proper divisors (17828907).

66313525 is a wasteful number, since it uses less digits than its factorization.

66313525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61740 (or 61735 counting only the distinct ones).

The product of its digits is 16200, while the sum is 31.

The square root of 66313525 is about 8143.3116727779. The cubic root of 66313525 is about 404.7629054789.

The spelling of 66313525 in words is "sixty-six million, three hundred thirteen thousand, five hundred twenty-five".