16623975 has 12 divisors (see below), whose sum is σ = 27485096. Its totient is φ = 8866080.

The previous prime is 16623961. The next prime is 16624001. The reversal of 16623975 is 57932661.

It is not a de Polignac number, because 16623975 - 2⁷ = 16623847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 110752 + ... + 110901.

Almost surely, 2^16623975 is an apocalyptic number.

16623975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16623975 is a deficient number, since it is larger than the sum of its proper divisors (10861121).

16623975 is a wasteful number, since it uses less digits than its factorization.

16623975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221666 (or 221661 counting only the distinct ones).

The product of its digits is 68040, while the sum is 39.

The square root of 16623975 is about 4077.2509120730. The cubic root of 16623975 is about 255.2181907988.

The spelling of 16623975 in words is "sixteen million, six hundred twenty-three thousand, nine hundred seventy-five".