66966683 has 6 divisors (see below), whose sum is σ = 77900076. Its totient is φ = 57399972.

The previous prime is 66966673. The next prime is 66966733. The reversal of 66966683 is 38666966.

It is not a de Polignac number, because 66966683 - 2⁶ = 66966619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66966643) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 683285 + ... + 683382.

It is an arithmetic number, because the mean of its divisors is an integer number (12983346).

Almost surely, 2^66966683 is an apocalyptic number.

66966683 is a deficient number, since it is larger than the sum of its proper divisors (10933393).

66966683 is a wasteful number, since it uses less digits than its factorization.

66966683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1366681 (or 1366674 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 50.

The square root of 66966683 is about 8183.3173591154. The cubic root of 66966683 is about 406.0874761967.

The spelling of 66966683 in words is "sixty-six million, nine hundred sixty-six thousand, six hundred eighty-three".