668213879383 has 4 divisors (see below), whose sum is σ = 668219759208. Its totient is φ = 668207999560.

The previous prime is 668213879381. The next prime is 668213879429. The reversal of 668213879383 is 383978312866.

668213879383 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 668213879383 - 2¹ = 668213879381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668213879381) 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, 2766016 + ... + 2997877.

It is an arithmetic number, because the mean of its divisors is an integer number (167054939802).

Almost surely, 2^668213879383 is an apocalyptic number.

668213879383 is a deficient number, since it is larger than the sum of its proper divisors (5879825).

668213879383 is a wasteful number, since it uses less digits than its factorization.

668213879383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5879824.

The product of its digits is 62705664, while the sum is 64.

The spelling of 668213879383 in words is "six hundred sixty-eight billion, two hundred thirteen million, eight hundred seventy-nine thousand, three hundred eighty-three".