16663983 has 16 divisors (see below), whose sum is σ = 26497536. Its totient is φ = 9108000.

The previous prime is 16663963. The next prime is 16663987. The reversal of 16663983 is 38936661.

It is not a de Polignac number, because 16663983 - 2¹⁰ = 16662959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16663987) 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, 16768 + ... + 17733.

It is an arithmetic number, because the mean of its divisors is an integer number (1656096).

Almost surely, 2^16663983 is an apocalyptic number.

16663983 is a deficient number, since it is larger than the sum of its proper divisors (9833553).

16663983 is a wasteful number, since it uses less digits than its factorization.

16663983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34534.

The product of its digits is 139968, while the sum is 42.

The square root of 16663983 is about 4082.1542107079. The cubic root of 16663983 is about 255.4227666014.

The spelling of 16663983 in words is "sixteen million, six hundred sixty-three thousand, nine hundred eighty-three".