16665017 has 8 divisors (see below), whose sum is σ = 17026440. Its totient is φ = 16306560.

The previous prime is 16665001. The next prime is 16665023. The reversal of 16665017 is 71056661.

It can be written as a sum of positive squares in 4 ways, for example, as 2042041 + 14622976 = 1429^2 + 3824^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16665017 - 2⁴ = 16665001 is a prime.

It is a super-2 number, since 2×16665017² = 555445583220578, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16664017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13373 + ... + 14565.

It is an arithmetic number, because the mean of its divisors is an integer number (2128305).

Almost surely, 2^16665017 is an apocalyptic number.

It is an amenable number.

16665017 is a deficient number, since it is larger than the sum of its proper divisors (361423).

16665017 is a wasteful number, since it uses less digits than its factorization.

16665017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1483.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 16665017 is about 4082.2808575599. The cubic root of 16665017 is about 255.4280494856.

The spelling of 16665017 in words is "sixteen million, six hundred sixty-five thousand, seventeen".