166865236683264 has 480 divisors, whose sum is σ = 574790186520000. Its totient is φ = 47657907118080.

The previous prime is 166865236683259. The next prime is 166865236683403. The reversal of 166865236683264 is 462386632568661.

166865236683264 is a `hidden beast` number, since 1 + 6 + 6 + 8 + 6 + 5 + 236 + 68 + 326 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 166865236683192 and 166865236683201.

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, 1862061819 + ... + 1862151429.

It is an arithmetic number, because the mean of its divisors is an integer number (1197479555250).

Almost surely, 2^{166865236683264} is an apocalyptic number.

166865236683264 is a gapful number since it is divisible by the number (14) 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 166865236683264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (287395093260000).

166865236683264 is an abundant number, since it is smaller than the sum of its proper divisors (407924949836736).

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

166865236683264 is an equidigital number, since it uses as much as digits as its factorization.

166865236683264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92401 (or 92372 counting only the distinct ones).

The product of its digits is 2149908480, while the sum is 72.

The spelling of 166865236683264 in words is "one hundred sixty-six trillion, eight hundred sixty-five billion, two hundred thirty-six million, six hundred eighty-three thousand, two hundred sixty-four".