673799898923666 has 8 divisors (see below), whose sum is σ = 1038016060504140. Its totient is φ = 327794545422288.

The previous prime is 673799898923659. The next prime is 673799898923713. The reversal of 673799898923666 is 666329898997376.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 458587448769025 + 215212450154641 = 21414655^2 + 14670121^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4552702019681 + ... + 4552702019828.

Almost surely, 2^{673799898923666} is an apocalyptic number.

673799898923666 is a deficient number, since it is larger than the sum of its proper divisors (364216161580474).

673799898923666 is a wasteful number, since it uses less digits than its factorization.

673799898923666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9105404039548.

The product of its digits is 479980505088, while the sum is 98.

The spelling of 673799898923666 in words is "six hundred seventy-three trillion, seven hundred ninety-nine billion, eight hundred ninety-eight million, nine hundred twenty-three thousand, six hundred sixty-six".