16661173066340 has 48 divisors (see below), whose sum is σ = 38170482444864. Its totient is φ = 6058410038400.

The previous prime is 16661173066331. The next prime is 16661173066387. The reversal of 16661173066340 is 4366037116661.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5580602 + ... + 8029038.

It is an arithmetic number, because the mean of its divisors is an integer number (795218384268).

Almost surely, 2^{16661173066340} is an apocalyptic number.

16661173066340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16661173066340 is an abundant number, since it is smaller than the sum of its proper divisors (21509309378524).

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

16661173066340 is a wasteful number, since it uses less digits than its factorization.

16661173066340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2479388 (or 2479386 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 50.

The spelling of 16661173066340 in words is "sixteen trillion, six hundred sixty-one billion, one hundred seventy-three million, sixty-six thousand, three hundred forty".