16669643361 has 32 divisors (see below), whose sum is σ = 26778697728. Its totient is φ = 9022086720.

The previous prime is 16669643351. The next prime is 16669643371. The reversal of 16669643361 is 16334696661.

It is an interprime number because it is at equal distance from previous prime (16669643351) and next prime (16669643371).

It is not a de Polignac number, because 16669643361 - 2¹⁴ = 16669626977 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 241810 + ... + 303003.

It is an arithmetic number, because the mean of its divisors is an integer number (836834304).

Almost surely, 2^16669643361 is an apocalyptic number.

It is an amenable number.

16669643361 is a deficient number, since it is larger than the sum of its proper divisors (10109054367).

16669643361 is a wasteful number, since it uses less digits than its factorization.

16669643361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544901.

The product of its digits is 2519424, while the sum is 51.

The spelling of 16669643361 in words is "sixteen billion, six hundred sixty-nine million, six hundred forty-three thousand, three hundred sixty-one".