660494 has 4 divisors (see below), whose sum is σ = 990744. Its totient is φ = 330246.

The previous prime is 660493. The next prime is 660503. The reversal of 660494 is 494066.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 660494.

It is not an unprimeable number, because it can be changed into a prime (660493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165122 + ... + 165125.

It is an arithmetic number, because the mean of its divisors is an integer number (247686).

2⁶⁶⁰⁴⁹⁴ is an apocalyptic number.

660494 is a deficient number, since it is larger than the sum of its proper divisors (330250).

660494 is a wasteful number, since it uses less digits than its factorization.

660494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330249.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 660494 is about 812.7078195760. The cubic root of 660494 is about 87.0875939909.

It can be divided in two parts, 66049 and 4, that multiplied together give a square (264196 = 514²).

The spelling of 660494 in words is "six hundred sixty thousand, four hundred ninety-four".