6685884390 has 32 divisors (see below), whose sum is σ = 16563741696. Its totient is φ = 1725389280.

The previous prime is 6685884377. The next prime is 6685884409. The reversal of 6685884390 is 934885866.

It is a self number, because there is not a number n which added to its sum of digits gives 6685884390.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3593632 + ... + 3595491.

It is an arithmetic number, because the mean of its divisors is an integer number (517616928).

Almost surely, 2^6685884390 is an apocalyptic number.

6685884390 is an abundant number, since it is smaller than the sum of its proper divisors (9877857306).

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

6685884390 is a wasteful number, since it uses less digits than its factorization.

6685884390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7189164.

The product of its (nonzero) digits is 9953280, while the sum is 57.

The square root of 6685884390 is about 81767.2574445297. The cubic root of 6685884390 is about 1883.8787798233.

The spelling of 6685884390 in words is "six billion, six hundred eighty-five million, eight hundred eighty-four thousand, three hundred ninety".