7879665 has 16 divisors (see below), whose sum is σ = 12643776. Its totient is φ = 4190400.

The previous prime is 7879637. The next prime is 7879679. The reversal of 7879665 is 5669787.

It is not a de Polignac number, because 7879665 - 2⁷ = 7879537 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7630 + ... + 8600.

It is an arithmetic number, because the mean of its divisors is an integer number (790236).

Almost surely, 2^7879665 is an apocalyptic number.

It is an amenable number.

7879665 is a deficient number, since it is larger than the sum of its proper divisors (4764111).

7879665 is a wasteful number, since it uses less digits than its factorization.

7879665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1520.

The product of its digits is 635040, while the sum is 48.

The square root of 7879665 is about 2807.0740994851. The cubic root of 7879665 is about 198.9921379351.

The spelling of 7879665 in words is "seven million, eight hundred seventy-nine thousand, six hundred sixty-five".