665494 has 16 divisors (see below), whose sum is σ = 1068480. Its totient is φ = 309960.

The previous prime is 665479. The next prime is 665501. The reversal of 665494 is 494566.

665494 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 3049 + ... + 3259.

It is an arithmetic number, because the mean of its divisors is an integer number (66780).

2⁶⁶⁵⁴⁹⁴ is an apocalyptic number.

665494 is a deficient number, since it is larger than the sum of its proper divisors (402986).

665494 is a wasteful number, since it uses less digits than its factorization.

665494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315.

The product of its digits is 25920, while the sum is 34.

The square root of 665494 is about 815.7781561184. The cubic root of 665494 is about 87.3067954771.

The spelling of 665494 in words is "six hundred sixty-five thousand, four hundred ninety-four".