1668738339 has 12 divisors (see below), whose sum is σ = 2488155072. Its totient is φ = 1076605200.

The previous prime is 1668738307. The next prime is 1668738349. The reversal of 1668738339 is 9338378661.

It is not a de Polignac number, because 1668738339 - 2⁵ = 1668738307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1668738349) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2990292 + ... + 2990849.

It is an arithmetic number, because the mean of its divisors is an integer number (207346256).

Almost surely, 2^1668738339 is an apocalyptic number.

1668738339 is a deficient number, since it is larger than the sum of its proper divisors (819416733).

1668738339 is a wasteful number, since it uses less digits than its factorization.

1668738339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5981178 (or 5981175 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 54.

The square root of 1668738339 is about 40850.1938673490. The cubic root of 1668738339 is about 1186.1221459263.

The spelling of 1668738339 in words is "one billion, six hundred sixty-eight million, seven hundred thirty-eight thousand, three hundred thirty-nine".