66910248936 has 80 divisors (see below), whose sum is σ = 187623548640. Its totient is φ = 22278080160.

The previous prime is 66910248887. The next prime is 66910248941. The reversal of 66910248936 is 63984201966.

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 19 ways as a sum of consecutive naturals, for example, 516571 + ... + 632981.

It is an arithmetic number, because the mean of its divisors is an integer number (2345294358).

Almost surely, 2^66910248936 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66910248936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93811774320).

66910248936 is an abundant number, since it is smaller than the sum of its proper divisors (120713299704).

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

66910248936 is a wasteful number, since it uses less digits than its factorization.

66910248936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117316 (or 117303 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 54.

The spelling of 66910248936 in words is "sixty-six billion, nine hundred ten million, two hundred forty-eight thousand, nine hundred thirty-six".