66841070520 has 288 divisors, whose sum is σ = 246192598800. Its totient is φ = 14473396224.

The previous prime is 66841070479. The next prime is 66841070521. The reversal of 66841070520 is 2507014866.

It is a super-2 number, since 2×66841070520² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66841070521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2106936 + ... + 2138424.

Almost surely, 2^66841070520 is an apocalyptic number.

66841070520 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 66841070520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123096299400).

66841070520 is an abundant number, since it is smaller than the sum of its proper divisors (179351528280).

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

66841070520 is a wasteful number, since it uses less digits than its factorization.

66841070520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31555 (or 31525 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The spelling of 66841070520 in words is "sixty-six billion, eight hundred forty-one million, seventy thousand, five hundred twenty".