1668900038 has 16 divisors (see below), whose sum is σ = 2701233360. Its totient is φ = 768742176.

The previous prime is 1668900029. The next prime is 1668900041. The reversal of 1668900038 is 8300098661.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1668899968 and 1668900004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49820 + ... + 76287.

It is an arithmetic number, because the mean of its divisors is an integer number (168827085).

Almost surely, 2^1668900038 is an apocalyptic number.

1668900038 is a deficient number, since it is larger than the sum of its proper divisors (1032333322).

1668900038 is a wasteful number, since it uses less digits than its factorization.

1668900038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126631.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 1668900038 is about 40852.1729899402. The cubic root of 1668900038 is about 1186.1604560208.

Adding to 1668900038 its reverse (8300098661), we get a palindrome (9968998699).

The spelling of 1668900038 in words is "one billion, six hundred sixty-eight million, nine hundred thousand, thirty-eight".