6551994960 has 320 divisors, whose sum is σ = 27150643200. Its totient is φ = 1418715648.

The previous prime is 6551994959. The next prime is 6551995013. The reversal of 6551994960 is 694991556.

6551994960 is a `hidden beast` number, since 65 + 5 + 1 + 99 + 496 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 6551994897 and 6551994906.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 275877 + ... + 298683.

It is an arithmetic number, because the mean of its divisors is an integer number (84845760).

Almost surely, 2^6551994960 is an apocalyptic number.

6551994960 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 6551994960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13575321600).

6551994960 is an abundant number, since it is smaller than the sum of its proper divisors (20598648240).

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

6551994960 is a wasteful number, since it uses less digits than its factorization.

6551994960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22855 (or 22843 counting only the distinct ones).

The product of its (nonzero) digits is 2624400, while the sum is 54.

The square root of 6551994960 is about 80944.3942469150. The cubic root of 6551994960 is about 1871.2185676705.

The spelling of 6551994960 in words is "six billion, five hundred fifty-one million, nine hundred ninety-four thousand, nine hundred sixty".