16766261 has 2 divisors, whose sum is σ = 16766262. Its totient is φ = 16766260.

The previous prime is 16766251. The next prime is 16766293. The reversal of 16766261 is 16266761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12208036 + 4558225 = 3494^2 + 2135^2 .

It is a cyclic number.

It is not a de Polignac number, because 16766261 - 2¹⁰ = 16765237 is a prime.

It is a super-2 number, since 2×16766261² = 562215015840242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16766201) 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 as a sum of consecutive naturals, namely, 8383130 + 8383131.

It is an arithmetic number, because the mean of its divisors is an integer number (8383131).

Almost surely, 2^16766261 is an apocalyptic number.

It is an amenable number.

16766261 is a deficient number, since it is larger than the sum of its proper divisors (1).

16766261 is an equidigital number, since it uses as much as digits as its factorization.

16766261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 35.

The square root of 16766261 is about 4094.6625013547. The cubic root of 16766261 is about 255.9442678564.

Subtracting from 16766261 its reverse (16266761), we obtain a triangular number (499500 = T₉₉₉).

The spelling of 16766261 in words is "sixteen million, seven hundred sixty-six thousand, two hundred sixty-one".