16685507 has 2 divisors, whose sum is σ = 16685508. Its totient is φ = 16685506.

The previous prime is 16685447. The next prime is 16685519. The reversal of 16685507 is 70558661.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16685507 - 2²⁰ = 15636931 is a prime.

It is a super-2 number, since 2×16685507² = 556812287694098, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16685587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8342753 + 8342754.

It is an arithmetic number, because the mean of its divisors is an integer number (8342754).

Almost surely, 2^16685507 is an apocalyptic number.

16685507 is a deficient number, since it is larger than the sum of its proper divisors (1).

16685507 is an equidigital number, since it uses as much as digits as its factorization.

16685507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 16685507 is about 4084.7897130697. The cubic root of 16685507 is about 255.5326913872.

The spelling of 16685507 in words is "sixteen million, six hundred eighty-five thousand, five hundred seven".