668265543354 has 64 divisors (see below), whose sum is σ = 1420624759680. Its totient is φ = 209193600000.

The previous prime is 668265543343. The next prime is 668265543371. The reversal of 668265543354 is 453345562866.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 668265543294 and 668265543303.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2219854 + ... + 2502854.

It is an arithmetic number, because the mean of its divisors is an integer number (22197261870).

Almost surely, 2^668265543354 is an apocalyptic number.

668265543354 is an abundant number, since it is smaller than the sum of its proper divisors (752359216326).

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

668265543354 is a wasteful number, since it uses less digits than its factorization.

668265543354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283407.

The product of its digits is 62208000, while the sum is 57.

The spelling of 668265543354 in words is "six hundred sixty-eight billion, two hundred sixty-five million, five hundred forty-three thousand, three hundred fifty-four".