3456689666 has 8 divisors (see below), whose sum is σ = 5199724044. Its totient is φ = 1723448320.

The previous prime is 3456689657. The next prime is 3456689671. The reversal of 3456689666 is 6669866543.

It can be written as a sum of positive squares in 2 ways, for example, as 2864497441 + 592192225 = 53521^2 + 24335^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2447375 + ... + 2448786.

Almost surely, 2^3456689666 is an apocalyptic number.

3456689666 is a deficient number, since it is larger than the sum of its proper divisors (1743034378).

3456689666 is a wasteful number, since it uses less digits than its factorization.

3456689666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4896516.

The product of its digits is 33592320, while the sum is 59.

The square root of 3456689666 is about 58793.6192626377. The cubic root of 3456689666 is about 1512.0058231745.

The spelling of 3456689666 in words is "three billion, four hundred fifty-six million, six hundred eighty-nine thousand, six hundred sixty-six".