3221666366 has 16 divisors (see below), whose sum is σ = 4854795264. Its totient is φ = 1603411704.

The previous prime is 3221666341. The next prime is 3221666407. The reversal of 3221666366 is 6636661223.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1285871 + ... + 1288373.

It is an arithmetic number, because the mean of its divisors is an integer number (303424704).

Almost surely, 2^3221666366 is an apocalyptic number.

3221666366 is a deficient number, since it is larger than the sum of its proper divisors (1633128898).

3221666366 is a wasteful number, since it uses less digits than its factorization.

3221666366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5215.

The product of its digits is 279936, while the sum is 41.

The square root of 3221666366 is about 56759.7248583888. The cubic root of 3221666366 is about 1476.9309371036.

The spelling of 3221666366 in words is "three billion, two hundred twenty-one million, six hundred sixty-six thousand, three hundred sixty-six".