66864168 has 48 divisors (see below), whose sum is σ = 206962080. Its totient is φ = 19103904.

The previous prime is 66864139. The next prime is 66864181. The reversal of 66864168 is 86146866.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65830 + ... + 66837.

It is an arithmetic number, because the mean of its divisors is an integer number (4311710).

Almost surely, 2^66864168 is an apocalyptic number.

It is an amenable number.

66864168 is an abundant number, since it is smaller than the sum of its proper divisors (140097912).

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

66864168 is a wasteful number, since it uses less digits than its factorization.

66864168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132686 (or 132679 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 66864168 is about 8177.0513022727. The cubic root of 66864168 is about 405.8801526105.

The spelling of 66864168 in words is "sixty-six million, eight hundred sixty-four thousand, one hundred sixty-eight".