6851616 has 48 divisors (see below), whose sum is σ = 18144000. Its totient is φ = 2263808.

The previous prime is 6851599. The next prime is 6851617. The reversal of 6851616 is 6161586.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×6851616² = 93889283622912, which contains 22 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (6851617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14065 + ... + 14543.

It is an arithmetic number, because the mean of its divisors is an integer number (378000).

Almost surely, 2^6851616 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 6851616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9072000).

6851616 is an abundant number, since it is smaller than the sum of its proper divisors (11292384).

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

6851616 is a wasteful number, since it uses less digits than its factorization.

6851616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641 (or 633 counting only the distinct ones).

The product of its digits is 8640, while the sum is 33.

The square root of 6851616 is about 2617.5591683857. The cubic root of 6851616 is about 189.9317945400.

The spelling of 6851616 in words is "six million, eight hundred fifty-one thousand, six hundred sixteen".