6666299136 has 288 divisors, whose sum is σ = 23311411200. Its totient is φ = 1838592000.

The previous prime is 6666299119. The next prime is 6666299141. The reversal of 6666299136 is 6319926666.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

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, 1400761 + ... + 1405511.

It is an arithmetic number, because the mean of its divisors is an integer number (80942400).

Almost surely, 2^6666299136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6666299136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11655705600).

6666299136 is an abundant number, since it is smaller than the sum of its proper divisors (16645112064).

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

6666299136 is a wasteful number, since it uses less digits than its factorization.

6666299136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4812 (or 4792 counting only the distinct ones).

The product of its digits is 3779136, while the sum is 54.

The square root of 6666299136 is about 81647.4074052569. The cubic root of 6666299136 is about 1882.0374711666.

The spelling of 6666299136 in words is "six billion, six hundred sixty-six million, two hundred ninety-nine thousand, one hundred thirty-six".