16618887 has 12 divisors (see below), whose sum is σ = 24077664. Its totient is φ = 11045760.

The previous prime is 16618873. The next prime is 16618933. The reversal of 16618887 is 78881661.

It is not a de Polignac number, because 16618887 - 2⁸ = 16618631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16618807) 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, 562 + ... + 5792.

It is an arithmetic number, because the mean of its divisors is an integer number (2006472).

Almost surely, 2^16618887 is an apocalyptic number.

16618887 is a deficient number, since it is larger than the sum of its proper divisors (7458777).

16618887 is a wasteful number, since it uses less digits than its factorization.

16618887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5590 (or 5587 counting only the distinct ones).

The product of its digits is 129024, while the sum is 45.

The square root of 16618887 is about 4076.6269144968. The cubic root of 16618887 is about 255.1921504433.

The spelling of 16618887 in words is "sixteen million, six hundred eighteen thousand, eight hundred eighty-seven".