7681616 has 10 divisors (see below), whose sum is σ = 14883162. Its totient is φ = 3840800.

The previous prime is 7681613. The next prime is 7681631. The reversal of 7681616 is 6161867.

It can be written as a sum of positive squares in only one way, i.e., 6864400 + 817216 = 2620^2 + 904^2 .

7681616 is a modest number, since divided by 1616 gives 768 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7681613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 240035 + ... + 240066.

Almost surely, 2^7681616 is an apocalyptic number.

It is an amenable number.

7681616 is a deficient number, since it is larger than the sum of its proper divisors (7201546).

7681616 is a wasteful number, since it uses less digits than its factorization.

7681616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480109 (or 480103 counting only the distinct ones).

The product of its digits is 12096, while the sum is 35.

The square root of 7681616 is about 2771.5728386604. The cubic root of 7681616 is about 197.3108031659.

The spelling of 7681616 in words is "seven million, six hundred eighty-one thousand, six hundred sixteen".