65566550160 has 240 divisors, whose sum is σ = 227431876464. Its totient is φ = 16918806528.

The previous prime is 65566550143. The next prime is 65566550221. The reversal of 65566550160 is 6105566556.

It can be written as a sum of positive squares in 8 ways, for example, as 8020224 + 65558529936 = 2832^2 + 256044^2 .

It is a tau number, because it is divible by the number of its divisors (240).

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2773912 + ... + 2797448.

Almost surely, 2^65566550160 is an apocalyptic number.

65566550160 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 65566550160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113715938232).

65566550160 is an abundant number, since it is smaller than the sum of its proper divisors (161865326304).

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

65566550160 is a wasteful number, since it uses less digits than its factorization.

65566550160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23682 (or 23673 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 45.

The spelling of 65566550160 in words is "sixty-five billion, five hundred sixty-six million, five hundred fifty thousand, one hundred sixty".