66026245712880 has 160 divisors (see below), whose sum is σ = 216770499800064. Its totient is φ = 16567541895168.

The previous prime is 66026245712851. The next prime is 66026245712887. The reversal of 66026245712880 is 8821754262066.

It is a self number, because there is not a number n which added to its sum of digits gives 66026245712880.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66026245712887) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16216437 + ... + 19875243.

Almost surely, 2^{66026245712880} is an apocalyptic number.

66026245712880 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 66026245712880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108385249900032).

66026245712880 is an abundant number, since it is smaller than the sum of its proper divisors (150744254087184).

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

66026245712880 is a wasteful number, since it uses less digits than its factorization.

66026245712880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3663263 (or 3663257 counting only the distinct ones).

The product of its (nonzero) digits is 15482880, while the sum is 57.

The spelling of 66026245712880 in words is "sixty-six trillion, twenty-six billion, two hundred forty-five million, seven hundred twelve thousand, eight hundred eighty".