16866853369 has 4 divisors (see below), whose sum is σ = 16934052240. Its totient is φ = 16799654500.

The previous prime is 16866853351. The next prime is 16866853379. The reversal of 16866853369 is 96335866861.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16866853369 is a prime.

It is a super-2 number, since 2×16866853369² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16866853379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33599059 + ... + 33599560.

It is an arithmetic number, because the mean of its divisors is an integer number (4233513060).

Almost surely, 2^16866853369 is an apocalyptic number.

It is an amenable number.

16866853369 is a deficient number, since it is larger than the sum of its proper divisors (67198871).

16866853369 is an equidigital number, since it uses as much as digits as its factorization.

16866853369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67198870.

The product of its digits is 33592320, while the sum is 61.

The spelling of 16866853369 in words is "sixteen billion, eight hundred sixty-six million, eight hundred fifty-three thousand, three hundred sixty-nine".