66680576 has 36 divisors (see below), whose sum is σ = 140116200. Its totient is φ = 31583232.

The previous prime is 66680533. The next prime is 66680587. The reversal of 66680576 is 67508666.

It is a congruent number.

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, 1991 + ... + 11718.

Almost surely, 2^66680576 is an apocalyptic number.

It is an amenable number.

66680576 is an abundant number, since it is smaller than the sum of its proper divisors (73435624).

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

66680576 is a wasteful number, since it uses less digits than its factorization.

66680576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13744 (or 13730 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 66680576 is about 8165.8175340868. The cubic root of 66680576 is about 405.5083308689.

The spelling of 66680576 in words is "sixty-six million, six hundred eighty thousand, five hundred seventy-six".