986665 has 8 divisors (see below), whose sum is σ = 1213128. Its totient is φ = 769920.

The previous prime is 986659. The next prime is 986693. The reversal of 986665 is 566689.

986665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 28224 + 958441 = 168^2 + 979^2 .

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

It is not a de Polignac number, because 986665 - 2⁵ = 986633 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

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, 2202 + ... + 2611.

It is an arithmetic number, because the mean of its divisors is an integer number (151641).

2⁹⁸⁶⁶⁶⁵ is an apocalyptic number.

It is an amenable number.

986665 is a deficient number, since it is larger than the sum of its proper divisors (226463).

986665 is a wasteful number, since it uses less digits than its factorization.

986665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4859.

The product of its digits is 77760, while the sum is 40.

The square root of 986665 is about 993.3101227713. The cubic root of 986665 is about 99.5535094287.

The spelling of 986665 in words is "nine hundred eighty-six thousand, six hundred sixty-five".