673661661488 has 40 divisors (see below), whose sum is σ = 1382296075008. Its totient is φ = 317377253952.

The previous prime is 673661661487. The next prime is 673661661493. The reversal of 673661661488 is 884166166376.

It is a self number, because there is not a number n which added to its sum of digits gives 673661661488.

It is not an unprimeable number, because it can be changed into a prime (673661661487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13636556 + ... + 13685867.

Almost surely, 2^673661661488 is an apocalyptic number.

It is an amenable number.

673661661488 is an abundant number, since it is smaller than the sum of its proper divisors (708634413520).

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

673661661488 is a wasteful number, since it uses less digits than its factorization.

673661661488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27322521 (or 27322515 counting only the distinct ones).

The product of its digits is 41803776, while the sum is 62.

The spelling of 673661661488 in words is "six hundred seventy-three billion, six hundred sixty-one million, six hundred sixty-one thousand, four hundred eighty-eight".