664862 has 16 divisors (see below), whose sum is σ = 1112832. Its totient is φ = 295320.

The previous prime is 664849. The next prime is 664879. The reversal of 664862 is 268466.

It is a happy number.

It is a congruent number.

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, 713 + ... + 1355.

It is an arithmetic number, because the mean of its divisors is an integer number (69552).

2⁶⁶⁴⁸⁶² is an apocalyptic number.

664862 is a deficient number, since it is larger than the sum of its proper divisors (447970).

664862 is a wasteful number, since it uses less digits than its factorization.

664862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703.

The product of its digits is 13824, while the sum is 32.

The square root of 664862 is about 815.3907038960. The cubic root of 664862 is about 87.2791491618.

The spelling of 664862 in words is "six hundred sixty-four thousand, eight hundred sixty-two".