16601916 has 12 divisors (see below), whose sum is σ = 38737832. Its totient is φ = 5533968.

The previous prime is 16601903. The next prime is 16601947. The reversal of 16601916 is 61910661.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×16601916² = 551247229742112, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 691735 + ... + 691758.

Almost surely, 2^16601916 is an apocalyptic number.

It is an amenable number.

16601916 is an abundant number, since it is smaller than the sum of its proper divisors (22135916).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16601916 is a wasteful number, since it uses less digits than its factorization.

16601916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1383500 (or 1383498 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 16601916 is about 4074.5448825605. The cubic root of 16601916 is about 255.1052545112.

The spelling of 16601916 in words is "sixteen million, six hundred one thousand, nine hundred sixteen".