66779168 has 24 divisors (see below), whose sum is σ = 133438032. Its totient is φ = 32890176.

The previous prime is 66779131. The next prime is 66779171. The reversal of 66779168 is 86197766.

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, 13430 + ... + 17717.

It is an arithmetic number, because the mean of its divisors is an integer number (5559918).

Almost surely, 2^66779168 is an apocalyptic number.

It is an amenable number.

66779168 is a deficient number, since it is larger than the sum of its proper divisors (66658864).

66779168 is a wasteful number, since it uses less digits than its factorization.

66779168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31224 (or 31216 counting only the distinct ones).

The product of its digits is 762048, while the sum is 50.

The square root of 66779168 is about 8171.8521768324. The cubic root of 66779168 is about 405.7080901369.

The spelling of 66779168 in words is "sixty-six million, seven hundred seventy-nine thousand, one hundred sixty-eight".