66631066260 has 96 divisors (see below), whose sum is σ = 204035981184. Its totient is φ = 16112640000.

The previous prime is 66631066259. The next prime is 66631066289. The reversal of 66631066260 is 6266013666.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 138780 + ... + 390540.

It is an arithmetic number, because the mean of its divisors is an integer number (2125374804).

Almost surely, 2^66631066260 is an apocalyptic number.

66631066260 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 66631066260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102017990592).

66631066260 is an abundant number, since it is smaller than the sum of its proper divisors (137404914924).

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

66631066260 is a wasteful number, since it uses less digits than its factorization.

66631066260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252185 (or 252183 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 42.

The spelling of 66631066260 in words is "sixty-six billion, six hundred thirty-one million, sixty-six thousand, two hundred sixty".