1668508422 has 16 divisors (see below), whose sum is σ = 3813733632. Its totient is φ = 476716680.

The previous prime is 1668508421. The next prime is 1668508487. The reversal of 1668508422 is 2248058661.

1668508422 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 39726391 = 1668508422 / (1 + 6 + 6 + 8 + 5 + 0 + 8 + 4 + 2 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668508421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19863154 + ... + 19863237.

It is an arithmetic number, because the mean of its divisors is an integer number (238358352).

Almost surely, 2^1668508422 is an apocalyptic number.

1668508422 is an abundant number, since it is smaller than the sum of its proper divisors (2145225210).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1668508422 is a wasteful number, since it uses less digits than its factorization.

1668508422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39726403.

The product of its (nonzero) digits is 184320, while the sum is 42.

The square root of 1668508422 is about 40847.3796221985. The cubic root of 1668508422 is about 1186.0676692069.

The spelling of 1668508422 in words is "one billion, six hundred sixty-eight million, five hundred eight thousand, four hundred twenty-two".