668363363156466 has 24 divisors (see below), whose sum is σ = 1448121311829504. Its totient is φ = 222787681310040.

The previous prime is 668363363156449. The next prime is 668363363156569. The reversal of 668363363156466 is 664651363363866.

668363363156466 is a `hidden beast` number, since 6 + 6 + 8 + 3 + 6 + 3 + 3 + 6 + 3 + 156 + 466 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 668363363156394 and 668363363156403.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36002335 + ... + 51311741.

It is an arithmetic number, because the mean of its divisors is an integer number (60338387992896).

Almost surely, 2^{668363363156466} is an apocalyptic number.

668363363156466 is an abundant number, since it is smaller than the sum of its proper divisors (779757948673038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

668363363156466 is a wasteful number, since it uses less digits than its factorization.

668363363156466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17734806 (or 17734803 counting only the distinct ones).

The product of its digits is 3627970560, while the sum is 72.

The spelling of 668363363156466 in words is "six hundred sixty-eight trillion, three hundred sixty-three billion, three hundred sixty-three million, one hundred fifty-six thousand, four hundred sixty-six".