66845028 has 24 divisors (see below), whose sum is σ = 157582432. Its totient is φ = 22051584.

The previous prime is 66845027. The next prime is 66845057. The reversal of 66845028 is 82054866.

It is not an unprimeable number, because it can be changed into a prime (66845027) 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, 27550 + ... + 29877.

Almost surely, 2^66845028 is an apocalyptic number.

It is an amenable number.

66845028 is an abundant number, since it is smaller than the sum of its proper divisors (90737404).

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

66845028 is a wasteful number, since it uses less digits than its factorization.

66845028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57531 (or 57529 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 39.

The square root of 66845028 is about 8175.8808699736. The cubic root of 66845028 is about 405.8414209164.

The spelling of 66845028 in words is "sixty-six million, eight hundred forty-five thousand, twenty-eight".