7997765 has 16 divisors (see below), whose sum is σ = 10454400. Its totient is φ = 5850432.

The previous prime is 7997749. The next prime is 7997777. The reversal of 7997765 is 5677997.

It is a cyclic number.

It is not a de Polignac number, because 7997765 - 2⁴ = 7997749 is a prime.

It is a Curzon number.

It is a congruent number.

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, 1304 + ... + 4206.

It is an arithmetic number, because the mean of its divisors is an integer number (653400).

Almost surely, 2^7997765 is an apocalyptic number.

It is an amenable number.

7997765 is a deficient number, since it is larger than the sum of its proper divisors (2456635).

7997765 is a wasteful number, since it uses less digits than its factorization.

7997765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2956.

The product of its digits is 833490, while the sum is 50.

The square root of 7997765 is about 2828.0320012334. The cubic root of 7997765 is about 199.9813732653.

The spelling of 7997765 in words is "seven million, nine hundred ninety-seven thousand, seven hundred sixty-five".