66680308 has 6 divisors (see below), whose sum is σ = 116690546. Its totient is φ = 33340152.

The previous prime is 66680297. The next prime is 66680311. The reversal of 66680308 is 80308666.

It can be written as a sum of positive squares in only one way, i.e., 47914084 + 18766224 = 6922^2 + 4332^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8335035 + ... + 8335042.

Almost surely, 2^66680308 is an apocalyptic number.

It is an amenable number.

66680308 is a deficient number, since it is larger than the sum of its proper divisors (50010238).

66680308 is a wasteful number, since it uses less digits than its factorization.

66680308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16670081 (or 16670079 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 66680308 is about 8165.8011242009. The cubic root of 66680308 is about 405.5077876004.

The spelling of 66680308 in words is "sixty-six million, six hundred eighty thousand, three hundred eight".