660384216872814 has 128 divisors (see below), whose sum is σ = 1557456111636480. Its totient is φ = 182770972300800.

The previous prime is 660384216872771. The next prime is 660384216872819. The reversal of 660384216872814 is 418278612483066.

It is a super-2 number, since 2×660384216872814² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660384216872819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6193700424 + ... + 6193807044.

It is an arithmetic number, because the mean of its divisors is an integer number (12167625872160).

Almost surely, 2^{660384216872814} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 660384216872814, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (778728055818240).

660384216872814 is an abundant number, since it is smaller than the sum of its proper divisors (897071894763666).

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

660384216872814 is a wasteful number, since it uses less digits than its factorization.

660384216872814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141986.

The product of its (nonzero) digits is 148635648, while the sum is 66.

The spelling of 660384216872814 in words is "six hundred sixty trillion, three hundred eighty-four billion, two hundred sixteen million, eight hundred seventy-two thousand, eight hundred fourteen".