6685026066 has 20 divisors (see below), whose sum is σ = 14979410622. Its totient is φ = 2228341968.

The previous prime is 6685026041. The next prime is 6685026079. The reversal of 6685026066 is 6606205866.

It can be written as a sum of positive squares in only one way, i.e., 6670805625 + 14220441 = 81675^2 + 3771^2 .

It is an unprimeable number.

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 9 ways as a sum of consecutive naturals, for example, 20632635 + ... + 20632958.

Almost surely, 2^6685026066 is an apocalyptic number.

6685026066 is an abundant number, since it is smaller than the sum of its proper divisors (8294384556).

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

6685026066 is a wasteful number, since it uses less digits than its factorization.

6685026066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41265607 (or 41265598 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The square root of 6685026066 is about 81762.0086959708. The cubic root of 6685026066 is about 1883.7981598447.

The spelling of 6685026066 in words is "six billion, six hundred eighty-five million, twenty-six thousand, sixty-six".