6636690 has 48 divisors (see below), whose sum is σ = 17730648. Its totient is φ = 1721088.

The previous prime is 6636689. The next prime is 6636701. The reversal of 6636690 is 966366.

It can be written as a sum of positive squares in 4 ways, for example, as 6548481 + 88209 = 2559^2 + 297^2 .

It is a super-2 number, since 2×6636690² = 88091308312200, which contains 22 as substring.

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, 2334 + ... + 4326.

Almost surely, 2^6636690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6636690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8865324).

6636690 is an abundant number, since it is smaller than the sum of its proper divisors (11093958).

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

6636690 is a wasteful number, since it uses less digits than its factorization.

6636690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2043 (or 2040 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 36.

The square root of 6636690 is about 2576.1774007238. The cubic root of 6636690 is about 187.9246906755.

The spelling of 6636690 in words is "six million, six hundred thirty-six thousand, six hundred ninety".