6637623066 has 96 divisors (see below), whose sum is σ = 15331764240. Its totient is φ = 2071415808.

The previous prime is 6637623059. The next prime is 6637623071. The reversal of 6637623066 is 6603267366.

6637623066 is a `hidden beast` number, since 6 + 637 + 6 + 2 + 3 + 0 + 6 + 6 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 1391663025 + 5245960041 = 37305^2 + 72429^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10757590 + ... + 10758206.

Almost surely, 2^6637623066 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6637623066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7665882120).

6637623066 is an abundant number, since it is smaller than the sum of its proper divisors (8694141174).

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

6637623066 is a wasteful number, since it uses less digits than its factorization.

6637623066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248 (or 1245 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 45.

The square root of 6637623066 is about 81471.6089567403. The cubic root of 6637623066 is about 1879.3349717003.

The spelling of 6637623066 in words is "six billion, six hundred thirty-seven million, six hundred twenty-three thousand, sixty-six".