6550869780 has 864 divisors, whose sum is σ = 27327605760. Its totient is φ = 1254113280.

The previous prime is 6550869779. The next prime is 6550869841. The reversal of 6550869780 is 879680556.

6550869780 is a `hidden beast` number, since 6 + 5 + 508 + 69 + 78 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 67534692 + ... + 67534788.

Almost surely, 2^6550869780 is an apocalyptic number.

6550869780 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6550869780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13663802880).

6550869780 is an abundant number, since it is smaller than the sum of its proper divisors (20776735980).

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

6550869780 is a wasteful number, since it uses less digits than its factorization.

6550869780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189 (or 177 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 54.

The square root of 6550869780 is about 80937.4436216020. The cubic root of 6550869780 is about 1871.1114461879. Note that the first 3 decimals are identical.

The spelling of 6550869780 in words is "six billion, five hundred fifty million, eight hundred sixty-nine thousand, seven hundred eighty".