667594 has 8 divisors (see below), whose sum is σ = 1004868. Its totient is φ = 332640.

The previous prime is 667577. The next prime is 667631. The reversal of 667594 is 495766.

It can be written as a sum of positive squares in 2 ways, for example, as 585225 + 82369 = 765^2 + 287^2 .

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 774 + ... + 1390.

2⁶⁶⁷⁵⁹⁴ is an apocalyptic number.

667594 is a deficient number, since it is larger than the sum of its proper divisors (337274).

667594 is a wasteful number, since it uses less digits than its factorization.

667594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1160.

The product of its digits is 45360, while the sum is 37.

The square root of 667594 is about 817.0642569590. The cubic root of 667594 is about 87.3985327215.

It can be divided in two parts, 6 and 67594, that added together give a square (67600 = 260²).

The spelling of 667594 in words is "six hundred sixty-seven thousand, five hundred ninety-four".