7715668 has 12 divisors (see below), whose sum is σ = 13578292. Its totient is φ = 3836160.

The previous prime is 7715657. The next prime is 7715681. The reversal of 7715668 is 8665177.

It can be written as a sum of positive squares in 2 ways, for example, as 219024 + 7496644 = 468^2 + 2738^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 7715668.

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, 4605 + ... + 6052.

Almost surely, 2^7715668 is an apocalyptic number.

It is an amenable number.

7715668 is a deficient number, since it is larger than the sum of its proper divisors (5862624).

7715668 is a wasteful number, since it uses less digits than its factorization.

7715668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10842 (or 10840 counting only the distinct ones).

The product of its digits is 70560, while the sum is 40.

The square root of 7715668 is about 2777.7091280406. The cubic root of 7715668 is about 197.6019278388.

The spelling of 7715668 in words is "seven million, seven hundred fifteen thousand, six hundred sixty-eight".