8551661760 has 168 divisors, whose sum is σ = 29521623456. Its totient is φ = 2272112640.

The previous prime is 8551661737. The next prime is 8551661761. The reversal of 8551661760 is 671661558.

8551661760 is a `hidden beast` number, since 8 + 5 + 516 + 61 + 76 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (8551661761) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 803997 + ... + 814563.

Almost surely, 2^8551661760 is an apocalyptic number.

8551661760 is a gapful number since it is divisible by the number (80) 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 8551661760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14760811728).

8551661760 is an abundant number, since it is smaller than the sum of its proper divisors (20969961696).

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

8551661760 is a wasteful number, since it uses less digits than its factorization.

8551661760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10871 (or 10858 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The square root of 8551661760 is about 92475.1953769226. The cubic root of 8551661760 is about 2044.9538199729.

The spelling of 8551661760 in words is "eight billion, five hundred fifty-one million, six hundred sixty-one thousand, seven hundred sixty".