66928844 has 12 divisors (see below), whose sum is σ = 117497184. Its totient is φ = 33358224.

The previous prime is 66928837. The next prime is 66928853. The reversal of 66928844 is 44882966.

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, 25124 + ... + 27659.

It is an arithmetic number, because the mean of its divisors is an integer number (9791432).

Almost surely, 2^66928844 is an apocalyptic number.

It is an amenable number.

66928844 is a deficient number, since it is larger than the sum of its proper divisors (50568340).

66928844 is a wasteful number, since it uses less digits than its factorization.

66928844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53104 (or 53102 counting only the distinct ones).

The product of its digits is 663552, while the sum is 47.

The square root of 66928844 is about 8181.0050727279. The cubic root of 66928844 is about 406.0109762699.

The spelling of 66928844 in words is "sixty-six million, nine hundred twenty-eight thousand, eight hundred forty-four".