6778633536 has 168 divisors, whose sum is σ = 20189220480. Its totient is φ = 2171925504.

The previous prime is 6778633517. The next prime is 6778633541. The reversal of 6778633536 is 6353368776.

6778633536 is a `hidden beast` number, since 6 + 7 + 78 + 6 + 33 + 536 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4392381 + ... + 4393923.

Almost surely, 2^6778633536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6778633536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10094610240).

6778633536 is an abundant number, since it is smaller than the sum of its proper divisors (13410586944).

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

6778633536 is a wasteful number, since it uses less digits than its factorization.

6778633536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1853 (or 1840 counting only the distinct ones).

The product of its digits is 11430720, while the sum is 54.

The square root of 6778633536 is about 82332.4573664603. The cubic root of 6778633536 is about 1892.5501009976.

The spelling of 6778633536 in words is "six billion, seven hundred seventy-eight million, six hundred thirty-three thousand, five hundred thirty-six".