673659681 has 8 divisors (see below), whose sum is σ = 898759680. Its totient is φ = 448833072.

The previous prime is 673659677. The next prime is 673659683. The reversal of 673659681 is 186956376.

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

It is not a de Polignac number, because 673659681 - 2² = 673659677 is a prime.

It is a super-2 number, since 2×673659681² = 907634731610043522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (673659683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62526 + ... + 72503.

It is an arithmetic number, because the mean of its divisors is an integer number (112344960).

Almost surely, 2^673659681 is an apocalyptic number.

It is an amenable number.

673659681 is a deficient number, since it is larger than the sum of its proper divisors (225099999).

673659681 is a wasteful number, since it uses less digits than its factorization.

673659681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136695.

The product of its digits is 1632960, while the sum is 51.

The square root of 673659681 is about 25954.9548448846. The cubic root of 673659681 is about 876.6243268854.

The spelling of 673659681 in words is "six hundred seventy-three million, six hundred fifty-nine thousand, six hundred eighty-one".