166583303818560 has 560 divisors, whose sum is σ = 660445242114240. Its totient is φ = 39608659722240.

The previous prime is 166583303818517. The next prime is 166583303818573. The reversal of 166583303818560 is 65818303385661.

It is a happy number.

166583303818560 is a `hidden beast` number, since 1 + 6 + 6 + 5 + 8 + 3 + 30 + 38 + 1 + 8 + 560 = 666.

It is a super-2 number, since 2×166583303818560² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1576486 + ... + 18320805.

Almost surely, 2^{166583303818560} is an apocalyptic number.

166583303818560 is a gapful number since it is divisible by the number (10) 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 166583303818560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (330222621057120).

166583303818560 is an abundant number, since it is smaller than the sum of its proper divisors (493861938295680).

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

166583303818560 is a wasteful number, since it uses less digits than its factorization.

166583303818560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19897356 (or 19897337 counting only the distinct ones).

The product of its (nonzero) digits is 74649600, while the sum is 63.

The spelling of 166583303818560 in words is "one hundred sixty-six trillion, five hundred eighty-three billion, three hundred three million, eight hundred eighteen thousand, five hundred sixty".