66708984 has 16 divisors (see below), whose sum is σ = 166772520. Its totient is φ = 22236320.

The previous prime is 66708977. The next prime is 66708989. The reversal of 66708984 is 48980766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66708989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1389747 + ... + 1389794.

Almost surely, 2^66708984 is an apocalyptic number.

It is an amenable number.

66708984 is an abundant number, since it is smaller than the sum of its proper divisors (100063536).

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

66708984 is a wasteful number, since it uses less digits than its factorization.

66708984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2779550 (or 2779546 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 48.

The square root of 66708984 is about 8167.5567950275. The cubic root of 66708984 is about 405.5659090815.

The spelling of 66708984 in words is "sixty-six million, seven hundred eight thousand, nine hundred eighty-four".