6681616 has 40 divisors (see below), whose sum is σ = 14086400. Its totient is φ = 3058560.

The previous prime is 6681589. The next prime is 6681637. The reversal of 6681616 is 6161866.

6681616 = T₆₄₁ + T₆₄₂ + ... + T₆₇₁.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9070 + ... + 9778.

It is an arithmetic number, because the mean of its divisors is an integer number (352160).

Almost surely, 2^6681616 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 6681616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7043200).

6681616 is an abundant number, since it is smaller than the sum of its proper divisors (7404784).

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

6681616 is a wasteful number, since it uses less digits than its factorization.

6681616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767 (or 761 counting only the distinct ones).

The product of its digits is 10368, while the sum is 34.

The square root of 6681616 is about 2584.8822023450. The cubic root of 6681616 is about 188.3477793672.

The spelling of 6681616 in words is "six million, six hundred eighty-one thousand, six hundred sixteen".