16660503 has 12 divisors (see below), whose sum is σ = 24460488. Its totient is φ = 10924560.

The previous prime is 16660499. The next prime is 16660517. The reversal of 16660503 is 30506661.

It is not a de Polignac number, because 16660503 - 2² = 16660499 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16660543) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14625 + ... + 15722.

It is an arithmetic number, because the mean of its divisors is an integer number (2038374).

Almost surely, 2^16660503 is an apocalyptic number.

16660503 is a deficient number, since it is larger than the sum of its proper divisors (7799985).

16660503 is a wasteful number, since it uses less digits than its factorization.

16660503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30414 (or 30411 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 16660503 is about 4081.7279429183. The cubic root of 16660503 is about 255.4049850760.

The spelling of 16660503 in words is "sixteen million, six hundred sixty thousand, five hundred three".