66706808 has 64 divisors (see below), whose sum is σ = 151580160. Its totient is φ = 26902656.

The previous prime is 66706799. The next prime is 66706811. The reversal of 66706808 is 80860766.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85910 + ... + 86682.

It is an arithmetic number, because the mean of its divisors is an integer number (2368440).

Almost surely, 2^66706808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66706808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75790080).

66706808 is an abundant number, since it is smaller than the sum of its proper divisors (84873352).

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

66706808 is a wasteful number, since it uses less digits than its factorization.

66706808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 876 (or 872 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 66706808 is about 8167.4235839707. The cubic root of 66706808 is about 405.5614992756.

The spelling of 66706808 in words is "sixty-six million, seven hundred six thousand, eight hundred eight".