3261245666 has 12 divisors (see below), whose sum is σ = 5690541078. Its totient is φ = 1397676672.

The previous prime is 3261245651. The next prime is 3261245717. The reversal of 3261245666 is 6665421623.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2398942441 + 862303225 = 48979^2 + 29365^2 .

It is an unprimeable number.

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 in 5 ways as a sum of consecutive naturals, for example, 16638911 + ... + 16639106.

Almost surely, 2^3261245666 is an apocalyptic number.

3261245666 is a deficient number, since it is larger than the sum of its proper divisors (2429295412).

3261245666 is a wasteful number, since it uses less digits than its factorization.

3261245666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33278033 (or 33278026 counting only the distinct ones).

The product of its digits is 311040, while the sum is 41.

The square root of 3261245666 is about 57107.3170968485. The cubic root of 3261245666 is about 1482.9545413398.

The spelling of 3261245666 in words is "three billion, two hundred sixty-one million, two hundred forty-five thousand, six hundred sixty-six".