6616655166 has 64 divisors (see below), whose sum is σ = 14910324480. Its totient is φ = 1939829760.

The previous prime is 6616655141. The next prime is 6616655189. The reversal of 6616655166 is 6615566166.

It is a super-3 number, since 3×6616655166³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 429550 + ... + 444686.

It is an arithmetic number, because the mean of its divisors is an integer number (232973820).

Almost surely, 2^6616655166 is an apocalyptic number.

6616655166 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 6616655166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7455162240).

6616655166 is an abundant number, since it is smaller than the sum of its proper divisors (8293669314).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6616655166 is a wasteful number, since it uses less digits than its factorization.

6616655166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15369.

The product of its digits is 1166400, while the sum is 48.

The square root of 6616655166 is about 81342.8249202104. The cubic root of 6616655166 is about 1877.3539777085.

The spelling of 6616655166 in words is "six billion, six hundred sixteen million, six hundred fifty-five thousand, one hundred sixty-six".