66694489312 has 48 divisors (see below), whose sum is σ = 144967439232. Its totient is φ = 29950414720.

The previous prime is 66694489241. The next prime is 66694489327. The reversal of 66694489312 is 21398449666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1112188 + ... + 1170619.

It is an arithmetic number, because the mean of its divisors is an integer number (3020154984).

Almost surely, 2^66694489312 is an apocalyptic number.

It is an amenable number.

66694489312 is an abundant number, since it is smaller than the sum of its proper divisors (78272949920).

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

66694489312 is a wasteful number, since it uses less digits than its factorization.

66694489312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2282911 (or 2282903 counting only the distinct ones).

The product of its digits is 13436928, while the sum is 58.

The spelling of 66694489312 in words is "sixty-six billion, six hundred ninety-four million, four hundred eighty-nine thousand, three hundred twelve".