667042 has 8 divisors (see below), whose sum is σ = 1006236. Its totient is φ = 331632.

The previous prime is 667021. The next prime is 667081. The reversal of 667042 is 240766.

It can be written as a sum of positive squares in 2 ways, for example, as 622521 + 44521 = 789^2 + 211^2 .

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

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 666998 and 667016.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 453 + ... + 1240.

2⁶⁶⁷⁰⁴² is an apocalyptic number.

667042 is a deficient number, since it is larger than the sum of its proper divisors (339194).

667042 is a wasteful number, since it uses less digits than its factorization.

667042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1892.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 667042 is about 816.7263923738. The cubic root of 667042 is about 87.3744375913.

The spelling of 667042 in words is "six hundred sixty-seven thousand, forty-two".