16660447766020 has 24 divisors (see below), whose sum is σ = 34996843355544. Its totient is φ = 6662292811776.

The previous prime is 16660447765963. The next prime is 16660447766089. The reversal of 16660447766020 is 2066774406661.

It can be written as a sum of positive squares in 4 ways, for example, as 225807436864 + 16434640329156 = 475192^2 + 4053966^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117820989 + ... + 117962308.

It is an arithmetic number, because the mean of its divisors is an integer number (1458201806481).

Almost surely, 2^{16660447766020} is an apocalyptic number.

16660447766020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16660447766020 is an abundant number, since it is smaller than the sum of its proper divisors (18336395589524).

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

16660447766020 is a wasteful number, since it uses less digits than its factorization.

16660447766020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235786839 (or 235786837 counting only the distinct ones).

The product of its (nonzero) digits is 12192768, while the sum is 55.

The spelling of 16660447766020 in words is "sixteen trillion, six hundred sixty billion, four hundred forty-seven million, seven hundred sixty-six thousand, twenty".