16685379 has 16 divisors (see below), whose sum is σ = 24807040. Its totient is φ = 11084040.

The previous prime is 16685359. The next prime is 16685399. The reversal of 16685379 is 97358661.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (16685359) and next prime (16685399).

It is a de Polignac number, because none of the positive numbers 2^k-16685379 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (16685359) 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, 8004 + ... + 9870.

It is an arithmetic number, because the mean of its divisors is an integer number (1550440).

Almost surely, 2^16685379 is an apocalyptic number.

16685379 is a deficient number, since it is larger than the sum of its proper divisors (8121661).

16685379 is a wasteful number, since it uses less digits than its factorization.

16685379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2207 (or 2201 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 16685379 is about 4084.7740451584. The cubic root of 16685379 is about 255.5320379605.

The spelling of 16685379 in words is "sixteen million, six hundred eighty-five thousand, three hundred seventy-nine".