16890666277 has 2 divisors, whose sum is σ = 16890666278. Its totient is φ = 16890666276.

The previous prime is 16890666259. The next prime is 16890666283. The reversal of 16890666277 is 77266609861.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14398560036 + 2492106241 = 119994^2 + 49921^2 .

It is a cyclic number.

It is not a de Polignac number, because 16890666277 - 2¹¹ = 16890664229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16890666577) 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, 8445333138 + 8445333139.

It is an arithmetic number, because the mean of its divisors is an integer number (8445333139).

Almost surely, 2^16890666277 is an apocalyptic number.

It is an amenable number.

16890666277 is a deficient number, since it is larger than the sum of its proper divisors (1).

16890666277 is an equidigital number, since it uses as much as digits as its factorization.

16890666277 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9144576, while the sum is 58.

The spelling of 16890666277 in words is "sixteen billion, eight hundred ninety million, six hundred sixty-six thousand, two hundred seventy-seven".