6776992638 has 96 divisors (see below), whose sum is σ = 16140458880. Its totient is φ = 2042314560.

The previous prime is 6776992627. The next prime is 6776992661. The reversal of 6776992638 is 8362996776.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4569045 + ... + 4570527.

It is an arithmetic number, because the mean of its divisors is an integer number (168129780).

Almost surely, 2^6776992638 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6776992638, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8070229440).

6776992638 is an abundant number, since it is smaller than the sum of its proper divisors (9363466242).

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

6776992638 is a wasteful number, since it uses less digits than its factorization.

6776992638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1894 (or 1891 counting only the distinct ones).

The product of its digits is 41150592, while the sum is 63.

The square root of 6776992638 is about 82322.4916896956. The cubic root of 6776992638 is about 1892.3973793479.

The spelling of 6776992638 in words is "six billion, seven hundred seventy-six million, nine hundred ninety-two thousand, six hundred thirty-eight".