667873 has 4 divisors (see below), whose sum is σ = 672448. Its totient is φ = 663300.

The previous prime is 667867. The next prime is 667883. The reversal of 667873 is 378766.

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 a cyclic number.

It is not a de Polignac number, because 667873 - 2⁹ = 667361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2061 + ... + 2362.

It is an arithmetic number, because the mean of its divisors is an integer number (168112).

2⁶⁶⁷⁸⁷³ is an apocalyptic number.

It is an amenable number.

667873 is a deficient number, since it is larger than the sum of its proper divisors (4575).

667873 is a wasteful number, since it uses less digits than its factorization.

667873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4574.

The product of its digits is 42336, while the sum is 37.

The square root of 667873 is about 817.2349723305. The cubic root of 667873 is about 87.4107061855.

It can be divided in two parts, 667 and 873, that added together give a triangular number (1540 = T₅₅).

The spelling of 667873 in words is "six hundred sixty-seven thousand, eight hundred seventy-three".