6642630338 has 16 divisors (see below), whose sum is σ = 10288270080. Its totient is φ = 3213267600.

The previous prime is 6642630287. The next prime is 6642630343. The reversal of 6642630338 is 8330362466.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 6642630295 and 6642630304.

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, 240548 + ... + 266736.

It is an arithmetic number, because the mean of its divisors is an integer number (643016880).

Almost surely, 2^6642630338 is an apocalyptic number.

6642630338 is a deficient number, since it is larger than the sum of its proper divisors (3645639742).

6642630338 is a wasteful number, since it uses less digits than its factorization.

6642630338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30313.

The product of its (nonzero) digits is 373248, while the sum is 41.

The square root of 6642630338 is about 81502.3333285618. Note that the first 4 decimals coincide. The cubic root of 6642630338 is about 1879.8074287814.

The spelling of 6642630338 in words is "six billion, six hundred forty-two million, six hundred thirty thousand, three hundred thirty-eight".