6611166566 has 8 divisors (see below), whose sum is σ = 9920389224. Its totient is φ = 3304370160.

The previous prime is 6611166563. The next prime is 6611166571. The reversal of 6611166566 is 6656611166.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6611166563) 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, 599735 + ... + 610658.

It is an arithmetic number, because the mean of its divisors is an integer number (1240048653).

Almost surely, 2^6611166566 is an apocalyptic number.

6611166566 is a deficient number, since it is larger than the sum of its proper divisors (3309222658).

6611166566 is a wasteful number, since it uses less digits than its factorization.

6611166566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1213126.

The product of its digits is 233280, while the sum is 44.

The square root of 6611166566 is about 81309.0804646074. The cubic root of 6611166566 is about 1876.8347377396.

The spelling of 6611166566 in words is "six billion, six hundred eleven million, one hundred sixty-six thousand, five hundred sixty-six".