673660 has 24 divisors (see below), whose sum is σ = 1524096. Its totient is φ = 248640.

The previous prime is 673649. The next prime is 673667. The reversal of 673660 is 66376.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a plaindrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673667) 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 7 ways as a sum of consecutive naturals, for example, 1036 + ... + 1555.

It is an arithmetic number, because the mean of its divisors is an integer number (63504).

2⁶⁷³⁶⁶⁰ is an apocalyptic number.

It is an amenable number.

673660 is an abundant number, since it is smaller than the sum of its proper divisors (850436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

673660 is a wasteful number, since it uses less digits than its factorization.

673660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2613 (or 2611 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 673660 is about 820.7679330968. The cubic root of 673660 is about 87.6624465256.

Subtracting from 673660 its product of nonzero digits (4536), we obtain a square (669124 = 818²).

The spelling of 673660 in words is "six hundred seventy-three thousand, six hundred sixty".