66880567026 has 256 divisors, whose sum is σ = 190363729920. Its totient is φ = 16930529280.

The previous prime is 66880567003. The next prime is 66880567037. The reversal of 66880567026 is 62076508866.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 19344690 + ... + 19348146.

It is an arithmetic number, because the mean of its divisors is an integer number (743608320).

Almost surely, 2^66880567026 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66880567026, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95181864960).

66880567026 is an abundant number, since it is smaller than the sum of its proper divisors (123483162894).

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

66880567026 is a wasteful number, since it uses less digits than its factorization.

66880567026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3646 (or 3640 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 54.

The spelling of 66880567026 in words is "sixty-six billion, eight hundred eighty million, five hundred sixty-seven thousand, twenty-six".