666650952746280 has 320 divisors, whose sum is σ = 2272426313921280. Its totient is φ = 175255895808000.

The previous prime is 666650952746249. The next prime is 666650952746399. The reversal of 666650952746280 is 82647259056666.

It is a super-3 number, since 3×666650952746280³ (a number of 45 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 666650952746199 and 666650952746208.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 3095540605 + ... + 3095755955.

It is an arithmetic number, because the mean of its divisors is an integer number (7101332231004).

Almost surely, 2^{666650952746280} is an apocalyptic number.

666650952746280 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666650952746280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1136213156960640).

666650952746280 is an abundant number, since it is smaller than the sum of its proper divisors (1605775361175000).

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

666650952746280 is a wasteful number, since it uses less digits than its factorization.

666650952746280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228902 (or 228889 counting only the distinct ones).

The product of its (nonzero) digits is 1567641600, while the sum is 72.

The spelling of 666650952746280 in words is "six hundred sixty-six trillion, six hundred fifty billion, nine hundred fifty-two million, seven hundred forty-six thousand, two hundred eighty".