66785808 has 40 divisors (see below), whose sum is σ = 173187328. Its totient is φ = 22177152.

The previous prime is 66785791. The next prime is 66785821. The reversal of 66785808 is 80858766.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10785 + ... + 15807.

Almost surely, 2^66785808 is an apocalyptic number.

It is an amenable number.

66785808 is an abundant number, since it is smaller than the sum of its proper divisors (106401520).

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

66785808 is a wasteful number, since it uses less digits than its factorization.

66785808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5311 (or 5305 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 48.

The square root of 66785808 is about 8172.2584393789. The cubic root of 66785808 is about 405.7215365081.

The spelling of 66785808 in words is "sixty-six million, seven hundred eighty-five thousand, eight hundred eight".