3266864581 has 2 divisors, whose sum is σ = 3266864582. Its totient is φ = 3266864580.

The previous prime is 3266864563. The next prime is 3266864659. The reversal of 3266864581 is 1854686623.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3256528356 + 10336225 = 57066^2 + 3215^2 .

It is a cyclic number.

It is not a de Polignac number, because 3266864581 - 2²⁵ = 3233310149 is a prime.

It is a super-2 number, since 2×3266864581² = 21344808381184611122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3266864981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1633432290 + 1633432291.

It is an arithmetic number, because the mean of its divisors is an integer number (1633432291).

Almost surely, 2^3266864581 is an apocalyptic number.

It is an amenable number.

3266864581 is a deficient number, since it is larger than the sum of its proper divisors (1).

3266864581 is an equidigital number, since it uses as much as digits as its factorization.

3266864581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1658880, while the sum is 49.

The square root of 3266864581 is about 57156.4920284651. The cubic root of 3266864581 is about 1483.8057308788.

The spelling of 3266864581 in words is "three billion, two hundred sixty-six million, eight hundred sixty-four thousand, five hundred eighty-one".