668135473473 has 8 divisors (see below), whose sum is σ = 959374013248. Its totient is φ = 411160291344.

The previous prime is 668135473433. The next prime is 668135473507. The reversal of 668135473473 is 374374531866.

It is a happy number.

668135473473 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 668135473473 - 2¹⁴ = 668135457089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668135473433) 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, 8565839365 + ... + 8565839442.

It is an arithmetic number, because the mean of its divisors is an integer number (119921751656).

Almost surely, 2^668135473473 is an apocalyptic number.

It is an amenable number.

668135473473 is a deficient number, since it is larger than the sum of its proper divisors (291238539775).

668135473473 is a wasteful number, since it uses less digits than its factorization.

668135473473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17131678823.

The product of its digits is 30481920, while the sum is 57.

The spelling of 668135473473 in words is "six hundred sixty-eight billion, one hundred thirty-five million, four hundred seventy-three thousand, four hundred seventy-three".