66616125 has 32 divisors (see below), whose sum is σ = 111376512. Its totient is φ = 35360000.

The previous prime is 66616097. The next prime is 66616127. The reversal of 66616125 is 52161666.

It is not a de Polignac number, because 66616125 - 2¹¹ = 66614077 is a prime.

It is a super-2 number, since 2×66616125² = 8875416220031250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66616127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 150154 + ... + 150596.

It is an arithmetic number, because the mean of its divisors is an integer number (3480516).

Almost surely, 2^66616125 is an apocalyptic number.

It is an amenable number.

66616125 is a deficient number, since it is larger than the sum of its proper divisors (44760387).

66616125 is a wasteful number, since it uses less digits than its factorization.

66616125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862 (or 852 counting only the distinct ones).

The product of its digits is 12960, while the sum is 33.

The square root of 66616125 is about 8161.8701900974. The cubic root of 66616125 is about 405.3776389241.

The spelling of 66616125 in words is "sixty-six million, six hundred sixteen thousand, one hundred twenty-five".