6684203138 has 4 divisors (see below), whose sum is σ = 10026304710. Its totient is φ = 3342101568.

The previous prime is 6684203137. The next prime is 6684203159. The reversal of 6684203138 is 8313024866.

It is a happy number.

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., 5840474929 + 843728209 = 76423^2 + 29047^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6684203095 and 6684203104.

It is not an unprimeable number, because it can be changed into a prime (6684203137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1671050783 + ... + 1671050786.

Almost surely, 2^6684203138 is an apocalyptic number.

6684203138 is a deficient number, since it is larger than the sum of its proper divisors (3342101572).

6684203138 is a wasteful number, since it uses less digits than its factorization.

6684203138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3342101571.

The product of its (nonzero) digits is 165888, while the sum is 41.

The square root of 6684203138 is about 81756.9760815553. The cubic root of 6684203138 is about 1883.7208580335.

The spelling of 6684203138 in words is "six billion, six hundred eighty-four million, two hundred three thousand, one hundred thirty-eight".