66336680 has 16 divisors (see below), whose sum is σ = 149257620. Its totient is φ = 26534656.

The previous prime is 66336679. The next prime is 66336713. The reversal of 66336680 is 8663366.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 66161956 + 174724 = 8134^2 + 418^2 .

It is a super-2 number, since 2×66336680² = 8801110226844800, which contains 22 as substring.

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, 829169 + ... + 829248.

Almost surely, 2^66336680 is an apocalyptic number.

It is an amenable number.

66336680 is an abundant number, since it is smaller than the sum of its proper divisors (82920940).

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

66336680 is a wasteful number, since it uses less digits than its factorization.

66336680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1658428 (or 1658424 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 38.

The square root of 66336680 is about 8144.7332675785. The cubic root of 66336680 is about 404.8100109748.

The spelling of 66336680 in words is "sixty-six million, three hundred thirty-six thousand, six hundred eighty".