66723309732 has 24 divisors (see below), whose sum is σ = 155693726272. Its totient is φ = 22240245600.

The previous prime is 66723309691. The next prime is 66723309767. The reversal of 66723309732 is 23790332766.

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, 270057 + ... + 454287.

Almost surely, 2^66723309732 is an apocalyptic number.

It is an amenable number.

66723309732 is an abundant number, since it is smaller than the sum of its proper divisors (88970416540).

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

66723309732 is a wasteful number, since it uses less digits than its factorization.

66723309732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214419 (or 214417 counting only the distinct ones).

The product of its (nonzero) digits is 1714608, while the sum is 48.

The spelling of 66723309732 in words is "sixty-six billion, seven hundred twenty-three million, three hundred nine thousand, seven hundred thirty-two".