66309397392 has 120 divisors (see below), whose sum is σ = 199342705536. Its totient is φ = 18938298624.

The previous prime is 66309397321. The next prime is 66309397411. The reversal of 66309397392 is 29379390366.

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 23 ways as a sum of consecutive naturals, for example, 10493818 + ... + 10500134.

Almost surely, 2^66309397392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66309397392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99671352768).

66309397392 is an abundant number, since it is smaller than the sum of its proper divisors (133033308144).

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

66309397392 is a wasteful number, since it uses less digits than its factorization.

66309397392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10805 (or 10792 counting only the distinct ones).

The product of its (nonzero) digits is 9920232, while the sum is 57.

The spelling of 66309397392 in words is "sixty-six billion, three hundred nine million, three hundred ninety-seven thousand, three hundred ninety-two".