8642665 has 8 divisors (see below), whose sum is σ = 10526400. Its totient is φ = 6810672.

The previous prime is 8642651. The next prime is 8642723. The reversal of 8642665 is 5662468.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8642665 - 2⁵ = 8642633 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12565 + ... + 13234.

It is an arithmetic number, because the mean of its divisors is an integer number (1315800).

Almost surely, 2^8642665 is an apocalyptic number.

It is an amenable number.

8642665 is a deficient number, since it is larger than the sum of its proper divisors (1883735).

8642665 is a wasteful number, since it uses less digits than its factorization.

8642665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25871.

The product of its digits is 69120, while the sum is 37.

The square root of 8642665 is about 2939.8409820941. The cubic root of 8642665 is about 205.2182090523.

The spelling of 8642665 in words is "eight million, six hundred forty-two thousand, six hundred sixty-five".