1668311703 has 24 divisors (see below), whose sum is σ = 2462608512. Its totient is φ = 1088089488.

The previous prime is 1668311699. The next prime is 1668311707. The reversal of 1668311703 is 3071138661.

It is an interprime number because it is at equal distance from previous prime (1668311699) and next prime (1668311707).

It is not a de Polignac number, because 1668311703 - 2² = 1668311699 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668311707) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66100 + ... + 87782.

It is an arithmetic number, because the mean of its divisors is an integer number (102608688).

Almost surely, 2^1668311703 is an apocalyptic number.

1668311703 is a deficient number, since it is larger than the sum of its proper divisors (794296809).

1668311703 is a wasteful number, since it uses less digits than its factorization.

1668311703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21875 (or 21872 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 1668311703 is about 40844.9715754583. The cubic root of 1668311703 is about 1186.0210544754.

The spelling of 1668311703 in words is "one billion, six hundred sixty-eight million, three hundred eleven thousand, seven hundred three".