1668083738 has 4 divisors (see below), whose sum is σ = 2502125610. Its totient is φ = 834041868.

The previous prime is 1668083731. The next prime is 1668083749. The reversal of 1668083738 is 8373808661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1545826489 + 122257249 = 39317^2 + 11057^2 .

It is not an unprimeable number, because it can be changed into a prime (1668083731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 417020933 + ... + 417020936.

Almost surely, 2^1668083738 is an apocalyptic number.

1668083738 is a deficient number, since it is larger than the sum of its proper divisors (834041872).

1668083738 is an equidigital number, since it uses as much as digits as its factorization.

1668083738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 834041871.

The product of its (nonzero) digits is 1161216, while the sum is 50.

The square root of 1668083738 is about 40842.1808673337. The cubic root of 1668083738 is about 1185.9670310766.

The spelling of 1668083738 in words is "one billion, six hundred sixty-eight million, eighty-three thousand, seven hundred thirty-eight".