673940660 has 12 divisors (see below), whose sum is σ = 1415275428. Its totient is φ = 269576256.

The previous prime is 673940653. The next prime is 673940669. The reversal of 673940660 is 66049376.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 501491236 + 172449424 = 22394^2 + 13132^2 .

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673940669) 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, 16848497 + ... + 16848536.

It is an arithmetic number, because the mean of its divisors is an integer number (117939619).

Almost surely, 2^673940660 is an apocalyptic number.

It is an amenable number.

673940660 is an abundant number, since it is smaller than the sum of its proper divisors (741334768).

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

673940660 is a wasteful number, since it uses less digits than its factorization.

673940660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33697042 (or 33697040 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 41.

The square root of 673940660 is about 25960.3671006402. The cubic root of 673940660 is about 876.7461880153.

The spelling of 673940660 in words is "six hundred seventy-three million, nine hundred forty thousand, six hundred sixty".