667047 has 4 divisors (see below), whose sum is σ = 889400. Its totient is φ = 444696.

The previous prime is 667021. The next prime is 667081. The reversal of 667047 is 740766.

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

It is not a de Polignac number, because 667047 - 2⁶ = 666983 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667547) by changing a digit.

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, 111172 + ... + 111177.

It is an arithmetic number, because the mean of its divisors is an integer number (222350).

2⁶⁶⁷⁰⁴⁷ is an apocalyptic number.

667047 is a deficient number, since it is larger than the sum of its proper divisors (222353).

667047 is a wasteful number, since it uses less digits than its factorization.

667047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222352.

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 667047 is about 816.7294533687. The cubic root of 667047 is about 87.3746559040.

The spelling of 667047 in words is "six hundred sixty-seven thousand, forty-seven".