6685380 has 72 divisors (see below), whose sum is σ = 21846552. Its totient is φ = 1645056.

The previous prime is 6685379. The next prime is 6685391. The reversal of 6685380 is 835866.

It can be written as a sum of positive squares in 4 ways, for example, as 304704 + 6380676 = 552^2 + 2526^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 912 + ... + 3768.

Almost surely, 2^6685380 is an apocalyptic number.

6685380 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6685380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10923276).

6685380 is an abundant number, since it is smaller than the sum of its proper divisors (15161172).

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

6685380 is a wasteful number, since it uses less digits than its factorization.

6685380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2885 (or 2880 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 6685380 is about 2585.6101794354. The cubic root of 6685380 is about 188.3831404714.

The spelling of 6685380 in words is "six million, six hundred eighty-five thousand, three hundred eighty".