16669643331 has 16 divisors (see below), whose sum is σ = 25522899840. Its totient is φ = 9571086720.

The previous prime is 16669643303. The next prime is 16669643351. The reversal of 16669643331 is 13334696661.

It is not a de Polignac number, because 16669643331 - 2¹¹ = 16669641283 is a prime.

It is a super-2 number, since 2×16669643331² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16669643351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13292550 + ... + 13293803.

It is an arithmetic number, because the mean of its divisors is an integer number (1595181240).

Almost surely, 2^16669643331 is an apocalyptic number.

16669643331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16669643331 is a deficient number, since it is larger than the sum of its proper divisors (8853256509).

16669643331 is a wasteful number, since it uses less digits than its factorization.

16669643331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26586386.

The product of its digits is 1259712, while the sum is 48.

The spelling of 16669643331 in words is "sixteen billion, six hundred sixty-nine million, six hundred forty-three thousand, three hundred thirty-one".