66072680 has 32 divisors (see below), whose sum is σ = 149121000. Its totient is φ = 26347776.

The previous prime is 66072661. The next prime is 66072697. The reversal of 66072680 is 8627066.

It can be written as a sum of positive squares in 4 ways, for example, as 49928356 + 16144324 = 7066^2 + 4018^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 66072680.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11594 + ... + 16326.

Almost surely, 2^66072680 is an apocalyptic number.

It is an amenable number.

66072680 is an abundant number, since it is smaller than the sum of its proper divisors (83048320).

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

66072680 is a wasteful number, since it uses less digits than its factorization.

66072680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5093 (or 5089 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 66072680 is about 8128.5103186254. The cubic root of 66072680 is about 404.2722897267.

The spelling of 66072680 in words is "sixty-six million, seventy-two thousand, six hundred eighty".