16663417 has 8 divisors (see below), whose sum is σ = 17715456. Its totient is φ = 15619392.

The previous prime is 16663397. The next prime is 16663421. The reversal of 16663417 is 71436661.

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 16663417 - 2¹¹ = 16661369 is a prime.

It is a super-2 number, since 2×16663417² = 555338932231778, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16660417) 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, 2608 + ... + 6334.

It is an arithmetic number, because the mean of its divisors is an integer number (2214432).

Almost surely, 2^16663417 is an apocalyptic number.

16663417 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

16663417 is a deficient number, since it is larger than the sum of its proper divisors (1052039).

16663417 is a wasteful number, since it uses less digits than its factorization.

16663417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4007.

The product of its digits is 18144, while the sum is 34.

The square root of 16663417 is about 4082.0848839778. The cubic root of 16663417 is about 255.4198747173.

The spelling of 16663417 in words is "sixteen million, six hundred sixty-three thousand, four hundred seventeen".