1668514321 has 8 divisors (see below), whose sum is σ = 1677374720. Its totient is φ = 1659666672.

The previous prime is 1668514319. The next prime is 1668514327. The reversal of 1668514321 is 1234158661.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1668514321 - 2¹ = 1668514319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1668514327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 369946 + ... + 374428.

It is an arithmetic number, because the mean of its divisors is an integer number (209671840).

Almost surely, 2^1668514321 is an apocalyptic number.

It is an amenable number.

1668514321 is a deficient number, since it is larger than the sum of its proper divisors (8860399).

1668514321 is a wasteful number, since it uses less digits than its factorization.

1668514321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6375.

The product of its digits is 34560, while the sum is 37.

The square root of 1668514321 is about 40847.4518299490. The cubic root of 1668514321 is about 1186.0690669833.

The spelling of 1668514321 in words is "one billion, six hundred sixty-eight million, five hundred fourteen thousand, three hundred twenty-one".