673666 has 8 divisors (see below), whose sum is σ = 1154880. Its totient is φ = 288708.

The previous prime is 673649. The next prime is 673667. The reversal of 673666 is 666376.

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

It is not an unprimeable number, because it can be changed into a prime (673667) 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, 24046 + ... + 24073.

It is an arithmetic number, because the mean of its divisors is an integer number (144360).

2⁶⁷³⁶⁶⁶ is an apocalyptic number.

673666 is a deficient number, since it is larger than the sum of its proper divisors (481214).

673666 is a wasteful number, since it uses less digits than its factorization.

673666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48128.

The product of its digits is 27216, while the sum is 34.

The square root of 673666 is about 820.7715882022. The cubic root of 673666 is about 87.6627067820.

The spelling of 673666 in words is "six hundred seventy-three thousand, six hundred sixty-six".