6636676638 has 16 divisors (see below), whose sum is σ = 13293441936. Its totient is φ = 2208877440.

The previous prime is 6636676637. The next prime is 6636676741. The reversal of 6636676638 is 8366766366.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6636676637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 832731 + ... + 840662.

It is an arithmetic number, because the mean of its divisors is an integer number (830840121).

Almost surely, 2^6636676638 is an apocalyptic number.

6636676638 is an abundant number, since it is smaller than the sum of its proper divisors (6656765298).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6636676638 is a wasteful number, since it uses less digits than its factorization.

6636676638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1674059.

The product of its digits is 23514624, while the sum is 57.

The square root of 6636676638 is about 81465.8004195626. The cubic root of 6636676638 is about 1879.2456455583.

The spelling of 6636676638 in words is "six billion, six hundred thirty-six million, six hundred seventy-six thousand, six hundred thirty-eight".