16651106566 has 8 divisors (see below), whose sum is σ = 25447917744. Its totient is φ = 8168467320.

The previous prime is 16651106533. The next prime is 16651106629. The reversal of 16651106566 is 66560115661.

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

It is a congruent number.

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, 78542850 + ... + 78543061.

It is an arithmetic number, because the mean of its divisors is an integer number (3180989718).

Almost surely, 2^16651106566 is an apocalyptic number.

16651106566 is a deficient number, since it is larger than the sum of its proper divisors (8796811178).

16651106566 is a wasteful number, since it uses less digits than its factorization.

16651106566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157085966.

The product of its (nonzero) digits is 194400, while the sum is 43.

The spelling of 16651106566 in words is "sixteen billion, six hundred fifty-one million, one hundred six thousand, five hundred sixty-six".