16116661 has 8 divisors (see below), whose sum is σ = 17747424. Its totient is φ = 14513520.

The previous prime is 16116643. The next prime is 16116673. The reversal of 16116661 is 16661161.

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 16116661 - 2⁷ = 16116533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16116601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5670 + ... + 8023.

It is an arithmetic number, because the mean of its divisors is an integer number (2218428).

Almost surely, 2^16116661 is an apocalyptic number.

16116661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16116661 is a deficient number, since it is larger than the sum of its proper divisors (1630763).

16116661 is a wasteful number, since it uses less digits than its factorization.

16116661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13811.

The product of its digits is 1296, while the sum is 28.

The square root of 16116661 is about 4014.5561398491. The cubic root of 16116661 is about 252.5951593752.

The spelling of 16116661 in words is "sixteen million, one hundred sixteen thousand, six hundred sixty-one".