6165665616 has 80 divisors (see below), whose sum is σ = 17452186560. Its totient is φ = 1860188160.

The previous prime is 6165665557. The next prime is 6165665659.

6165665616 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95416 + ... + 146408.

It is an arithmetic number, because the mean of its divisors is an integer number (218152332).

Almost surely, 2^6165665616 is an apocalyptic number.

6165665616 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6165665616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8726093280).

6165665616 is an abundant number, since it is smaller than the sum of its proper divisors (11286520944).

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

6165665616 is a wasteful number, since it uses less digits than its factorization.

6165665616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51244 (or 51238 counting only the distinct ones).

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

The square root of 6165665616 is about 78521.7525020933. The cubic root of 6165665616 is about 1833.6931217916.

The spelling of 6165665616 in words is "six billion, one hundred sixty-five million, six hundred sixty-five thousand, six hundred sixteen".