66928116 has 48 divisors (see below), whose sum is σ = 169839936. Its totient is φ = 20427264.

The previous prime is 66928097. The next prime is 66928123. The reversal of 66928116 is 61182966.

It is a super-2 number, since 2×66928116² = 8958745422618912, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3115 + ... + 11981.

It is an arithmetic number, because the mean of its divisors is an integer number (3538332).

Almost surely, 2^66928116 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66928116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84919968).

66928116 is an abundant number, since it is smaller than the sum of its proper divisors (102911820).

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

66928116 is a wasteful number, since it uses less digits than its factorization.

66928116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8928 (or 8926 counting only the distinct ones).

The product of its digits is 31104, while the sum is 39.

The square root of 66928116 is about 8180.9605792963. The cubic root of 66928116 is about 406.0095041738.

The spelling of 66928116 in words is "sixty-six million, nine hundred twenty-eight thousand, one hundred sixteen".