1668352338723 has 16 divisors (see below), whose sum is σ = 2542292766720. Its totient is φ = 953328599616.

The previous prime is 1668352338677. The next prime is 1668352338727. The reversal of 1668352338723 is 3278332538661.

It is a happy number.

It is not a de Polignac number, because 1668352338723 - 2¹⁰ = 1668352337699 is a prime.

It is a super-2 number, since 2×1668352338723² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1668352338727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 733111 + ... + 1968287.

It is an arithmetic number, because the mean of its divisors is an integer number (158893297920).

Almost surely, 2^{1668352338723} is an apocalyptic number.

1668352338723 is a deficient number, since it is larger than the sum of its proper divisors (873940427997).

1668352338723 is a wasteful number, since it uses less digits than its factorization.

1668352338723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1299506.

The product of its digits is 26127360, while the sum is 57.

The spelling of 1668352338723 in words is "one trillion, six hundred sixty-eight billion, three hundred fifty-two million, three hundred thirty-eight thousand, seven hundred twenty-three".