16610891 has 8 divisors (see below), whose sum is σ = 18611184. Its totient is φ = 14692320.

The previous prime is 16610827. The next prime is 16610903. The reversal of 16610891 is 19801661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16610891 - 2⁶ = 16610827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16610491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20000 + ... + 20813.

It is an arithmetic number, because the mean of its divisors is an integer number (2326398).

Almost surely, 2^16610891 is an apocalyptic number.

16610891 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16610891 is a deficient number, since it is larger than the sum of its proper divisors (2000293).

16610891 is a wasteful number, since it uses less digits than its factorization.

16610891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40861.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 16610891 is about 4075.6460837516. The cubic root of 16610891 is about 255.1512162183.

The spelling of 16610891 in words is "sixteen million, six hundred ten thousand, eight hundred ninety-one".