16366891 has 2 divisors, whose sum is σ = 16366892. Its totient is φ = 16366890.

The previous prime is 16366841. The next prime is 16366897. The reversal of 16366891 is 19866361.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16366891 - 2⁹ = 16366379 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16366897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8183445 + 8183446.

It is an arithmetic number, because the mean of its divisors is an integer number (8183446).

Almost surely, 2^16366891 is an apocalyptic number.

16366891 is a deficient number, since it is larger than the sum of its proper divisors (1).

16366891 is an equidigital number, since it uses as much as digits as its factorization.

16366891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 40.

The square root of 16366891 is about 4045.6014385997. The cubic root of 16366891 is about 253.8957298265.

The spelling of 16366891 in words is "sixteen million, three hundred sixty-six thousand, eight hundred ninety-one".