1668598437 has 16 divisors (see below), whose sum is σ = 2427739200. Its totient is φ = 1010985600.

The previous prime is 1668598423. The next prime is 1668598439. The reversal of 1668598437 is 7348958661.

It is not a de Polignac number, because 1668598437 - 2¹⁴ = 1668582053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668598439) 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, 205939 + ... + 213887.

It is an arithmetic number, because the mean of its divisors is an integer number (151733700).

Almost surely, 2^1668598437 is an apocalyptic number.

It is an amenable number.

1668598437 is a deficient number, since it is larger than the sum of its proper divisors (759140763).

1668598437 is a wasteful number, since it uses less digits than its factorization.

1668598437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14324.

The product of its digits is 8709120, while the sum is 57.

The square root of 1668598437 is about 40848.4814528031. The cubic root of 1668598437 is about 1186.0889980297.

The spelling of 1668598437 in words is "one billion, six hundred sixty-eight million, five hundred ninety-eight thousand, four hundred thirty-seven".