16665939942 has 16 divisors (see below), whose sum is σ = 33341448000. Its totient is φ = 5553718632.

The previous prime is 16665939911. The next prime is 16665940037. The reversal of 16665939942 is 24993956661.

It is a congruent number.

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, 375928 + ... + 417915.

It is an arithmetic number, because the mean of its divisors is an integer number (2083840500).

Almost surely, 2^16665939942 is an apocalyptic number.

16665939942 is an abundant number, since it is smaller than the sum of its proper divisors (16675508058).

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

16665939942 is a wasteful number, since it uses less digits than its factorization.

16665939942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797347.

The product of its digits is 18895680, while the sum is 60.

The spelling of 16665939942 in words is "sixteen billion, six hundred sixty-five million, nine hundred thirty-nine thousand, nine hundred forty-two".