66602680 has 16 divisors (see below), whose sum is σ = 149856120. Its totient is φ = 26641056.

The previous prime is 66602671. The next prime is 66602693. The reversal of 66602680 is 8620666.

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, 832494 + ... + 832573.

Almost surely, 2^66602680 is an apocalyptic number.

It is an amenable number.

66602680 is an abundant number, since it is smaller than the sum of its proper divisors (83253440).

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

66602680 is a wasteful number, since it uses less digits than its factorization.

66602680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1665078 (or 1665074 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 66602680 is about 8161.0465015217. The cubic root of 66602680 is about 405.3503649017.

The spelling of 66602680 in words is "sixty-six million, six hundred two thousand, six hundred eighty".