667137 has 4 divisors (see below), whose sum is σ = 889520. Its totient is φ = 444756.

The previous prime is 667129. The next prime is 667141. The reversal of 667137 is 731766.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 667137 - 2³ = 667129 is a prime.

It is a D-number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 667137.

It is not an unprimeable number, because it can be changed into a prime (667127) 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 in 3 ways as a sum of consecutive naturals, for example, 111187 + ... + 111192.

It is an arithmetic number, because the mean of its divisors is an integer number (222380).

2⁶⁶⁷¹³⁷ is an apocalyptic number.

It is an amenable number.

667137 is a deficient number, since it is larger than the sum of its proper divisors (222383).

667137 is a wasteful number, since it uses less digits than its factorization.

667137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222382.

The product of its digits is 5292, while the sum is 30.

The square root of 667137 is about 816.7845493152. The cubic root of 667137 is about 87.3785853449.

The spelling of 667137 in words is "six hundred sixty-seven thousand, one hundred thirty-seven".