66983886 has 12 divisors (see below), whose sum is σ = 145131792. Its totient is φ = 22327956.

The previous prime is 66983869. The next prime is 66983897. The reversal of 66983886 is 68838966.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1860646 + ... + 1860681.

It is an arithmetic number, because the mean of its divisors is an integer number (12094316).

Almost surely, 2^66983886 is an apocalyptic number.

66983886 is an abundant number, since it is smaller than the sum of its proper divisors (78147906).

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

66983886 is a wasteful number, since it uses less digits than its factorization.

66983886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3721335 (or 3721332 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 54.

The square root of 66983886 is about 8184.3683934681. The cubic root of 66983886 is about 406.1222463462.

The spelling of 66983886 in words is "sixty-six million, nine hundred eighty-three thousand, eight hundred eighty-six".