668011839 has 96 divisors (see below), whose sum is σ = 1103155200. Its totient is φ = 357772800.

The previous prime is 668011829. The next prime is 668011853. The reversal of 668011839 is 938110866.

It is not a de Polignac number, because 668011839 - 2²⁰ = 666963263 is a prime.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 668011839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668011829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 7505707 + ... + 7505795.

It is an arithmetic number, because the mean of its divisors is an integer number (11491200).

Almost surely, 2^668011839 is an apocalyptic number.

668011839 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

668011839 is a deficient number, since it is larger than the sum of its proper divisors (435143361).

668011839 is a wasteful number, since it uses less digits than its factorization.

668011839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197 (or 186 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 668011839 is about 25845.9249979566. The cubic root of 668011839 is about 874.1676281313.

The spelling of 668011839 in words is "six hundred sixty-eight million, eleven thousand, eight hundred thirty-nine".