66798139332 has 24 divisors (see below), whose sum is σ = 157318985376. Its totient is φ = 22057952128.

The previous prime is 66798139313. The next prime is 66798139333. The reversal of 66798139332 is 23393189766.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (66798139333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26010453 + ... + 26013020.

It is an arithmetic number, because the mean of its divisors is an integer number (6554957724).

Almost surely, 2^66798139332 is an apocalyptic number.

It is an amenable number.

66798139332 is an abundant number, since it is smaller than the sum of its proper divisors (90520846044).

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

66798139332 is a wasteful number, since it uses less digits than its factorization.

66798139332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52023587 (or 52023585 counting only the distinct ones).

The product of its digits is 8817984, while the sum is 57.

The spelling of 66798139332 in words is "sixty-six billion, seven hundred ninety-eight million, one hundred thirty-nine thousand, three hundred thirty-two".