16766891 has 2 divisors, whose sum is σ = 16766892. Its totient is φ = 16766890.

The previous prime is 16766833. The next prime is 16766927. The reversal of 16766891 is 19866761.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16766891 is a prime.

It is a super-2 number, since 2×16766891² = 562257267611762, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16766831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8383445 + 8383446.

It is an arithmetic number, because the mean of its divisors is an integer number (8383446).

Almost surely, 2^16766891 is an apocalyptic number.

16766891 is a deficient number, since it is larger than the sum of its proper divisors (1).

16766891 is an equidigital number, since it uses as much as digits as its factorization.

16766891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 44.

The square root of 16766891 is about 4094.7394300492. The cubic root of 16766891 is about 255.9474735576.

The spelling of 16766891 in words is "sixteen million, seven hundred sixty-six thousand, eight hundred ninety-one".