663072670658 has 8 divisors (see below), whose sum is σ = 998199653052. Its totient is φ = 330339452976.

The previous prime is 663072670657. The next prime is 663072670693. The reversal of 663072670658 is 856076270366.

It can be written as a sum of positive squares in 2 ways, for example, as 660908839369 + 2163831289 = 812963^2 + 46517^2 .

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

It is not an unprimeable number, because it can be changed into a prime (663072670657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 598440485 + ... + 598441592.

Almost surely, 2^663072670658 is an apocalyptic number.

663072670658 is a deficient number, since it is larger than the sum of its proper divisors (335126982394).

663072670658 is a wasteful number, since it uses less digits than its factorization.

663072670658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1196882356.

The product of its (nonzero) digits is 15240960, while the sum is 56.

The spelling of 663072670658 in words is "six hundred sixty-three billion, seventy-two million, six hundred seventy thousand, six hundred fifty-eight".