666453780760 has 16 divisors (see below), whose sum is σ = 1499521006800. Its totient is φ = 266581512288.

The previous prime is 666453780731. The next prime is 666453780779. The reversal of 666453780760 is 67087354666.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 666453780695 and 666453780704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8330672220 + ... + 8330672299.

It is an arithmetic number, because the mean of its divisors is an integer number (93720062925).

Almost surely, 2^666453780760 is an apocalyptic number.

It is an amenable number.

666453780760 is an abundant number, since it is smaller than the sum of its proper divisors (833067226040).

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

666453780760 is a wasteful number, since it uses less digits than its factorization.

666453780760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16661344530 (or 16661344526 counting only the distinct ones).

The product of its (nonzero) digits is 30481920, while the sum is 58.

The spelling of 666453780760 in words is "six hundred sixty-six billion, four hundred fifty-three million, seven hundred eighty thousand, seven hundred sixty".