667431404435122 has 32 divisors (see below), whose sum is σ = 1021938361678080. Its totient is φ = 326854806495360.

The previous prime is 667431404435099. The next prime is 667431404435189. The reversal of 667431404435122 is 221534404134766.

It is a self number, because there is not a number n which added to its sum of digits gives 667431404435122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49752678 + ... + 61726750.

It is an arithmetic number, because the mean of its divisors is an integer number (31935573802440).

Almost surely, 2^{667431404435122} is an apocalyptic number.

667431404435122 is a deficient number, since it is larger than the sum of its proper divisors (354506957242958).

667431404435122 is a wasteful number, since it uses less digits than its factorization.

667431404435122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11976978.

The product of its (nonzero) digits is 11612160, while the sum is 52.

Adding to 667431404435122 its reverse (221534404134766), we get a palindrome (888965808569888).

The spelling of 667431404435122 in words is "six hundred sixty-seven trillion, four hundred thirty-one billion, four hundred four million, four hundred thirty-five thousand, one hundred twenty-two".