664673301671366 has 8 divisors (see below), whose sum is σ = 1073703025776864. Its totient is φ = 306772293079080.

The previous prime is 664673301671333. The next prime is 664673301671417. The reversal of 664673301671366 is 663176103376466.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12782178878270 + ... + 12782178878321.

It is an arithmetic number, because the mean of its divisors is an integer number (134212878222108).

Almost surely, 2^{664673301671366} is an apocalyptic number.

664673301671366 is a deficient number, since it is larger than the sum of its proper divisors (409029724105498).

664673301671366 is a wasteful number, since it uses less digits than its factorization.

664673301671366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25564357756606.

The product of its (nonzero) digits is 246903552, while the sum is 65.

The spelling of 664673301671366 in words is "six hundred sixty-four trillion, six hundred seventy-three billion, three hundred one million, six hundred seventy-one thousand, three hundred sixty-six".