66678573332 has 12 divisors (see below), whose sum is σ = 133357146720. Its totient is φ = 28576531416.

The previous prime is 66678573331. The next prime is 66678573389. The reversal of 66678573332 is 23337587666.

It is a happy number.

66678573332 is an admirable number.

It is a hoax number, since the sum of its digits (56) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66678573331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1190688782 + ... + 1190688837.

It is an arithmetic number, because the mean of its divisors is an integer number (11113095560).

Almost surely, 2^66678573332 is an apocalyptic number.

It is an amenable number.

66678573332 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66678573332 is a wasteful number, since it uses less digits than its factorization.

66678573332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2381377630 (or 2381377628 counting only the distinct ones).

The product of its digits is 22861440, while the sum is 56.

The spelling of 66678573332 in words is "sixty-six billion, six hundred seventy-eight million, five hundred seventy-three thousand, three hundred thirty-two".