16669361 has 2 divisors, whose sum is σ = 16669362. Its totient is φ = 16669360.

The previous prime is 16669321. The next prime is 16669363. The reversal of 16669361 is 16396661.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16483600 + 185761 = 4060^2 + 431^2 .

It is a cyclic number.

It is not a de Polignac number, because 16669361 - 2¹⁸ = 16407217 is a prime.

It is a super-2 number, since 2×16669361² = 555735192296642, which contains 22 as substring.

Together with 16669363, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16669363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8334680 + 8334681.

It is an arithmetic number, because the mean of its divisors is an integer number (8334681).

Almost surely, 2^16669361 is an apocalyptic number.

It is an amenable number.

16669361 is a deficient number, since it is larger than the sum of its proper divisors (1).

16669361 is an equidigital number, since it uses as much as digits as its factorization.

16669361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 38.

The square root of 16669361 is about 4082.8128783965. The cubic root of 16669361 is about 255.4502413432.

The spelling of 16669361 in words is "sixteen million, six hundred sixty-nine thousand, three hundred sixty-one".