666094985280 has 140 divisors (see below), whose sum is σ = 2369417138220. Its totient is φ = 177625322496.

The previous prime is 666094985239. The next prime is 666094985291. The reversal of 666094985280 is 82589490666.

It can be written as a sum of positive squares in 2 ways, for example, as 192706952256 + 473388033024 = 438984^2 + 688032^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12823135 + ... + 12874974.

Almost surely, 2^666094985280 is an apocalyptic number.

666094985280 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

666094985280 is an abundant number, since it is smaller than the sum of its proper divisors (1703322152940).

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

666094985280 is a wasteful number, since it uses less digits than its factorization.

666094985280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25698138 (or 25698119 counting only the distinct ones).

The product of its (nonzero) digits is 44789760, while the sum is 63.

The spelling of 666094985280 in words is "six hundred sixty-six billion, ninety-four million, nine hundred eighty-five thousand, two hundred eighty".