667498 has 8 divisors (see below), whose sum is σ = 1078308. Its totient is φ = 308064.

The previous prime is 667487. The next prime is 667501. The reversal of 667498 is 894766.

It can be written as a sum of positive squares in 2 ways, for example, as 667489 + 9 = 817^2 + 3^2 .

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

It is a d-powerful number, because it can be written as 6³ + 6⁴ + 4⁷ + 7⁶ + 9⁶ + 8³ .

It is a self number, because there is not a number n which added to its sum of digits gives 667498.

It is an unprimeable number.

667498 is an untouchable number, because it is not equal to the sum of proper divisors of any 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, 12811 + ... + 12862.

2⁶⁶⁷⁴⁹⁸ is an apocalyptic number.

667498 is a deficient number, since it is larger than the sum of its proper divisors (410810).

667498 is a wasteful number, since it uses less digits than its factorization.

667498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25688.

The product of its digits is 72576, while the sum is 40.

The square root of 667498 is about 817.0055079374. The cubic root of 667498 is about 87.3943432184.

The spelling of 667498 in words is "six hundred sixty-seven thousand, four hundred ninety-eight".