6685391048 has 64 divisors (see below), whose sum is σ = 15253920000. Its totient is φ = 2740569216.

The previous prime is 6685391033. The next prime is 6685391059. The reversal of 6685391048 is 8401935866.

It is a junction number, because it is equal to n+sod(n) for n = 6685390987 and 6685391005.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10148 + ... + 116076.

It is an arithmetic number, because the mean of its divisors is an integer number (238342500).

Almost surely, 2^6685391048 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6685391048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7626960000).

6685391048 is an abundant number, since it is smaller than the sum of its proper divisors (8568528952).

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

6685391048 is a wasteful number, since it uses less digits than its factorization.

6685391048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105979 (or 105961 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 50.

The square root of 6685391048 is about 81764.2406434500. The cubic root of 6685391048 is about 1883.8324424289.

The spelling of 6685391048 in words is "six billion, six hundred eighty-five million, three hundred ninety-one thousand, forty-eight".