16654066666 has 8 divisors (see below), whose sum is σ = 24985379844. Its totient is φ = 8325606720.

The previous prime is 16654066661. The next prime is 16654066691. The reversal of 16654066666 is 66666045661.

It can be written as a sum of positive squares in 2 ways, for example, as 15319260441 + 1334806225 = 123771^2 + 36535^2 .

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

It is not an unprimeable number, because it can be changed into a prime (16654066661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 698655 + ... + 722098.

Almost surely, 2^16654066666 is an apocalyptic number.

16654066666 is a deficient number, since it is larger than the sum of its proper divisors (8331313178).

16654066666 is a wasteful number, since it uses less digits than its factorization.

16654066666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1426616.

The product of its (nonzero) digits is 5598720, while the sum is 52.

The spelling of 16654066666 in words is "sixteen billion, six hundred fifty-four million, sixty-six thousand, six hundred sixty-six".