6629771888 has 20 divisors (see below), whose sum is σ = 13192351320. Its totient is φ = 3225294144.

The previous prime is 6629771887. The next prime is 6629771893. The reversal of 6629771888 is 8881779266.

It is a self number, because there is not a number n which added to its sum of digits gives 6629771888.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6629771887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5598878 + ... + 5600061.

It is an arithmetic number, because the mean of its divisors is an integer number (659617566).

Almost surely, 2^6629771888 is an apocalyptic number.

It is an amenable number.

6629771888 is a deficient number, since it is larger than the sum of its proper divisors (6562579432).

6629771888 is a wasteful number, since it uses less digits than its factorization.

6629771888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11198984 (or 11198978 counting only the distinct ones).

The product of its digits is 16257024, while the sum is 62.

The square root of 6629771888 is about 81423.4111788495. The cubic root of 6629771888 is about 1878.5937015894.

The spelling of 6629771888 in words is "six billion, six hundred twenty-nine million, seven hundred seventy-one thousand, eight hundred eighty-eight".