66396680772 has 48 divisors (see below), whose sum is σ = 160134019584. Its totient is φ = 21390048000.

The previous prime is 66396680771. The next prime is 66396680783. The reversal of 66396680772 is 27708669366.

It is not an unprimeable number, because it can be changed into a prime (66396680771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165822 + ... + 400362.

It is an arithmetic number, because the mean of its divisors is an integer number (3336125408).

Almost surely, 2^66396680772 is an apocalyptic number.

66396680772 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

66396680772 is an abundant number, since it is smaller than the sum of its proper divisors (93737338812).

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

66396680772 is a wasteful number, since it uses less digits than its factorization.

66396680772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235340 (or 235338 counting only the distinct ones).

The product of its (nonzero) digits is 27433728, while the sum is 60.

The spelling of 66396680772 in words is "sixty-six billion, three hundred ninety-six million, six hundred eighty thousand, seven hundred seventy-two".