16665085865238 has 32 divisors (see below), whose sum is σ = 33523360372320. Its totient is φ = 5522847079680.

The previous prime is 16665085865227. The next prime is 16665085865459. The reversal of 16665085865238 is 83256858056661.

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, 1959306 + ... + 6096642.

It is an arithmetic number, because the mean of its divisors is an integer number (1047605011635).

Almost surely, 2^{16665085865238} is an apocalyptic number.

16665085865238 is an abundant number, since it is smaller than the sum of its proper divisors (16858274507082).

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

16665085865238 is a wasteful number, since it uses less digits than its factorization.

16665085865238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4141232.

The product of its (nonzero) digits is 497664000, while the sum is 69.

The spelling of 16665085865238 in words is "sixteen trillion, six hundred sixty-five billion, eighty-five million, eight hundred sixty-five thousand, two hundred thirty-eight".