66166828 has 24 divisors (see below), whose sum is σ = 142513952. Its totient is φ = 26175744.

The previous prime is 66166823. The next prime is 66166829. The reversal of 66166828 is 82866166.

It is not an unprimeable number, because it can be changed into a prime (66166823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90525 + ... + 91252.

Almost surely, 2^66166828 is an apocalyptic number.

It is an amenable number.

66166828 is an abundant number, since it is smaller than the sum of its proper divisors (76347124).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66166828 is a wasteful number, since it uses less digits than its factorization.

66166828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181801 (or 181799 counting only the distinct ones).

The product of its digits is 165888, while the sum is 43.

The square root of 66166828 is about 8134.2994781358. The cubic root of 66166828 is about 404.4642165751.

The spelling of 66166828 in words is "sixty-six million, one hundred sixty-six thousand, eight hundred twenty-eight".