66537125 has 16 divisors (see below), whose sum is σ = 84976320. Its totient is φ = 51987600.

The previous prime is 66537109. The next prime is 66537131. The reversal of 66537125 is 52173566.

It is not a de Polignac number, because 66537125 - 2⁴ = 66537109 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 815 + ... + 11564.

It is an arithmetic number, because the mean of its divisors is an integer number (5311020).

Almost surely, 2^66537125 is an apocalyptic number.

It is an amenable number.

66537125 is a deficient number, since it is larger than the sum of its proper divisors (18439195).

66537125 is a wasteful number, since it uses less digits than its factorization.

66537125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12437 (or 12427 counting only the distinct ones).

The product of its digits is 37800, while the sum is 35.

The square root of 66537125 is about 8157.0291773415. The cubic root of 66537125 is about 405.2173298837.

The spelling of 66537125 in words is "sixty-six million, five hundred thirty-seven thousand, one hundred twenty-five".