66672680 has 32 divisors (see below), whose sum is σ = 150792840. Its totient is φ = 26530560.

The previous prime is 66672679. The next prime is 66672707. The reversal of 66672680 is 8627666.

66672680 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 66552964 + 119716 = 8158^2 + 346^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3650 + ... + 12110.

Almost surely, 2^66672680 is an apocalyptic number.

It is an amenable number.

66672680 is an abundant number, since it is smaller than the sum of its proper divisors (84120160).

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

66672680 is a wasteful number, since it uses less digits than its factorization.

66672680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8669 (or 8665 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 66672680 is about 8165.3340409318. The cubic root of 66672680 is about 405.4923241077.

The spelling of 66672680 in words is "sixty-six million, six hundred seventy-two thousand, six hundred eighty".