3366866981 has 2 divisors, whose sum is σ = 3366866982. Its totient is φ = 3366866980.

The previous prime is 3366866963. The next prime is 3366866989. The reversal of 3366866981 is 1896686633.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2719622500 + 647244481 = 52150^2 + 25441^2 .

It is a cyclic number.

It is not a de Polignac number, because 3366866981 - 2¹⁸ = 3366604837 is a prime.

It is a super-2 number, since 2×3366866981² = 22671586535496108722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3366866989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1683433490 + 1683433491.

It is an arithmetic number, because the mean of its divisors is an integer number (1683433491).

Almost surely, 2^3366866981 is an apocalyptic number.

It is an amenable number.

3366866981 is a deficient number, since it is larger than the sum of its proper divisors (1).

3366866981 is an equidigital number, since it uses as much as digits as its factorization.

3366866981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6718464, while the sum is 56.

The square root of 3366866981 is about 58024.7100897540. The cubic root of 3366866981 is about 1498.7941391558.

The spelling of 3366866981 in words is "three billion, three hundred sixty-six million, eight hundred sixty-six thousand, nine hundred eighty-one".