16665770616 has 64 divisors (see below), whose sum is σ = 48125767680. Its totient is φ = 4753159680.

The previous prime is 16665770603. The next prime is 16665770669. The reversal of 16665770616 is 61607756661.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

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, 1852216 + ... + 1861191.

It is an arithmetic number, because the mean of its divisors is an integer number (751965120).

Almost surely, 2^16665770616 is an apocalyptic number.

It is an amenable number.

16665770616 is an abundant number, since it is smaller than the sum of its proper divisors (31459997064).

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

16665770616 is a wasteful number, since it uses less digits than its factorization.

16665770616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3713444 (or 3713440 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 51.

The spelling of 16665770616 in words is "sixteen billion, six hundred sixty-five million, seven hundred seventy thousand, six hundred sixteen".