6687228636 has 72 divisors (see below), whose sum is σ = 18533424000. Its totient is φ = 2016226080.

The previous prime is 6687228599. The next prime is 6687228703. The reversal of 6687228636 is 6368227866.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36375 + ... + 121233.

Almost surely, 2^6687228636 is an apocalyptic number.

6687228636 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 6687228636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9266712000).

6687228636 is an abundant number, since it is smaller than the sum of its proper divisors (11846195364).

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

6687228636 is a wasteful number, since it uses less digits than its factorization.

6687228636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85079 (or 85074 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 54.

The square root of 6687228636 is about 81775.4769842402. The cubic root of 6687228636 is about 1884.0050272358.

The spelling of 6687228636 in words is "six billion, six hundred eighty-seven million, two hundred twenty-eight thousand, six hundred thirty-six".