6651086800 has 120 divisors (see below), whose sum is σ = 17810020800. Its totient is φ = 2372106240.

The previous prime is 6651086731. The next prime is 6651086803. The reversal of 6651086800 is 86801566.

It is a happy number.

It is a super-2 number, since 2×6651086800² = 88473911242268480000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6651086803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 103461 + ... + 154939.

It is an arithmetic number, because the mean of its divisors is an integer number (148416840).

Almost surely, 2^6651086800 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 6651086800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8905010400).

6651086800 is an abundant number, since it is smaller than the sum of its proper divisors (11158934000).

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

6651086800 is a wasteful number, since it uses less digits than its factorization.

6651086800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51533 (or 51522 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 6651086800 is about 81554.1954776086. The cubic root of 6651086800 is about 1880.6047925921.

The spelling of 6651086800 in words is "six billion, six hundred fifty-one million, eighty-six thousand, eight hundred".