66680304 has 20 divisors (see below), whose sum is σ = 172257576. Its totient is φ = 22226752.

The previous prime is 66680297. The next prime is 66680311. The reversal of 66680304 is 40308666.

It is an interprime number because it is at equal distance from previous prime (66680297) and next prime (66680311).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 694539 + ... + 694634.

Almost surely, 2^66680304 is an apocalyptic number.

It is an amenable number.

66680304 is an abundant number, since it is smaller than the sum of its proper divisors (105577272).

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

66680304 is a wasteful number, since it uses less digits than its factorization.

66680304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1389184 (or 1389178 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 66680304 is about 8165.8008792769. The cubic root of 66680304 is about 405.5077794919.

The spelling of 66680304 in words is "sixty-six million, six hundred eighty thousand, three hundred four".