16669643337 has 48 divisors (see below), whose sum is σ = 25012045968. Its totient is φ = 10689822720.

The previous prime is 16669643303. The next prime is 16669643351. The reversal of 16669643337 is 73334696661.

It can be written as a sum of positive squares in 8 ways, for example, as 77369616 + 16592273721 = 8796^2 + 128811^2 .

It is not a de Polignac number, because 16669643337 - 2⁷ = 16669643209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16669643537) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11631973 + ... + 11633405.

It is an arithmetic number, because the mean of its divisors is an integer number (521084291).

Almost surely, 2^16669643337 is an apocalyptic number.

It is an amenable number.

16669643337 is a deficient number, since it is larger than the sum of its proper divisors (8342402631).

16669643337 is a wasteful number, since it uses less digits than its factorization.

16669643337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1850 (or 1847 counting only the distinct ones).

The product of its digits is 8817984, while the sum is 54.

The spelling of 16669643337 in words is "sixteen billion, six hundred sixty-nine million, six hundred forty-three thousand, three hundred thirty-seven".