66683567676 has 24 divisors (see below), whose sum is σ = 169739990784. Its totient is φ = 20207141680.

The previous prime is 66683567663. The next prime is 66683567693. The reversal of 66683567676 is 67676538666.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

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, 252589140 + ... + 252589403.

It is an arithmetic number, because the mean of its divisors is an integer number (7072499616).

Almost surely, 2^66683567676 is an apocalyptic number.

66683567676 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

66683567676 is an abundant number, since it is smaller than the sum of its proper divisors (103056423108).

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

66683567676 is a wasteful number, since it uses less digits than its factorization.

66683567676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505178561 (or 505178559 counting only the distinct ones).

The product of its digits is 274337280, while the sum is 66.

The spelling of 66683567676 in words is "sixty-six billion, six hundred eighty-three million, five hundred sixty-seven thousand, six hundred seventy-six".