673664023654261 has 8 divisors (see below), whose sum is σ = 674233405522560. Its totient is φ = 673094649663072.

The previous prime is 673664023654229. The next prime is 673664023654289. The reversal of 673664023654261 is 162456320466376.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 673664023654261 - 2⁵ = 673664023654229 is a prime.

It is a super-2 number, since 2×673664023654261² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 673664023654261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673664023654201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175933236 + ... + 179721538.

It is an arithmetic number, because the mean of its divisors is an integer number (84279175690320).

Almost surely, 2^{673664023654261} is an apocalyptic number.

It is an amenable number.

673664023654261 is a deficient number, since it is larger than the sum of its proper divisors (569381868299).

673664023654261 is a wasteful number, since it uses less digits than its factorization.

673664023654261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3938555.

The product of its (nonzero) digits is 156764160, while the sum is 61.

The spelling of 673664023654261 in words is "six hundred seventy-three trillion, six hundred sixty-four billion, twenty-three million, six hundred fifty-four thousand, two hundred sixty-one".