66428176 has 20 divisors (see below), whose sum is σ = 130153500. Its totient is φ = 32840192.

The previous prime is 66428147. The next prime is 66428189. The reversal of 66428176 is 67182466.

It can be written as a sum of positive squares in 2 ways, for example, as 27040000 + 39388176 = 5200^2 + 6276^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21901 + ... + 24748.

It is an arithmetic number, because the mean of its divisors is an integer number (6507675).

Almost surely, 2^66428176 is an apocalyptic number.

It is an amenable number.

66428176 is a deficient number, since it is larger than the sum of its proper divisors (63725324).

66428176 is a wasteful number, since it uses less digits than its factorization.

66428176 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46746 (or 46740 counting only the distinct ones).

The product of its digits is 96768, while the sum is 40.

The square root of 66428176 is about 8150.3482134201. The cubic root of 66428176 is about 404.9960391829.

The spelling of 66428176 in words is "sixty-six million, four hundred twenty-eight thousand, one hundred seventy-six".