16166861 has 8 divisors (see below), whose sum is σ = 16934400. Its totient is φ = 15404752.

The previous prime is 16166827. The next prime is 16166879. The reversal of 16166861 is 16866161.

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 16166861 - 2¹⁰ = 16165837 is a prime.

It is a super-2 number, since 2×16166861² = 522734789186642, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16160861) 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, 5540 + ... + 7938.

It is an arithmetic number, because the mean of its divisors is an integer number (2116800).

Almost surely, 2^16166861 is an apocalyptic number.

It is an amenable number.

16166861 is a deficient number, since it is larger than the sum of its proper divisors (767539).

16166861 is a wasteful number, since it uses less digits than its factorization.

16166861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2715.

The product of its digits is 10368, while the sum is 35.

The square root of 16166861 is about 4020.8035266598. The cubic root of 16166861 is about 252.8571477666.

The spelling of 16166861 in words is "sixteen million, one hundred sixty-six thousand, eight hundred sixty-one".