665662 has 8 divisors (see below), whose sum is σ = 1004976. Its totient is φ = 330672.

The previous prime is 665659. The next prime is 665677. The reversal of 665662 is 266566.

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

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, 663 + ... + 1330.

It is an arithmetic number, because the mean of its divisors is an integer number (125622).

2⁶⁶⁵⁶⁶² is an apocalyptic number.

665662 is a deficient number, since it is larger than the sum of its proper divisors (339314).

665662 is a wasteful number, since it uses less digits than its factorization.

665662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2162.

The product of its digits is 12960, while the sum is 31.

The square root of 665662 is about 815.8811187912. The cubic root of 665662 is about 87.3141415527.

The spelling of 665662 in words is "six hundred sixty-five thousand, six hundred sixty-two".