6685216 has 24 divisors (see below), whose sum is σ = 13936860. Its totient is φ = 3145728.

The previous prime is 6685201. The next prime is 6685247. The reversal of 6685216 is 6125866.

It can be written as a sum of positive squares in 2 ways, for example, as 6051600 + 633616 = 2460^2 + 796^2 .

It is a super-2 number, since 2×6685216² = 89384225933312, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5601 + ... + 6688.

Almost surely, 2^6685216 is an apocalyptic number.

It is an amenable number.

6685216 is an abundant number, since it is smaller than the sum of its proper divisors (7251644).

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

6685216 is a wasteful number, since it uses less digits than its factorization.

6685216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12316 (or 12308 counting only the distinct ones).

The product of its digits is 17280, while the sum is 34.

The square root of 6685216 is about 2585.5784652569. The cubic root of 6685216 is about 188.3816000410.

The spelling of 6685216 in words is "six million, six hundred eighty-five thousand, two hundred sixteen".