353216666 has 48 divisors (see below), whose sum is σ = 606735360. Its totient is φ = 153938400.

The previous prime is 353216641. The next prime is 353216683. The reversal of 353216666 is 666612353.

It is a happy number.

Its product of digits (116640) is a multiple of the sum of its prime divisors (480).

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 23 ways as a sum of consecutive naturals, for example, 1477775 + ... + 1478013.

It is an arithmetic number, because the mean of its divisors is an integer number (12640320).

Almost surely, 2^353216666 is an apocalyptic number.

353216666 is a deficient number, since it is larger than the sum of its proper divisors (253518694).

353216666 is a wasteful number, since it uses less digits than its factorization.

353216666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491 (or 480 counting only the distinct ones).

The product of its digits is 116640, while the sum is 38.

The square root of 353216666 is about 18794.0593273513. The cubic root of 353216666 is about 706.8822268207.

The spelling of 353216666 in words is "three hundred fifty-three million, two hundred sixteen thousand, six hundred sixty-six".