67640661100 has 72 divisors (see below), whose sum is σ = 148889845440. Its totient is φ = 26668561920.

The previous prime is 67640661083. The next prime is 67640661119. The reversal of 67640661100 is 116604676.

It is a self number, because there is not a number n which added to its sum of digits gives 67640661100.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4867362 + ... + 4881238.

It is an arithmetic number, because the mean of its divisors is an integer number (2067914520).

Almost surely, 2^67640661100 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 67640661100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74444922720).

67640661100 is an abundant number, since it is smaller than the sum of its proper divisors (81249184340).

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

67640661100 is a wasteful number, since it uses less digits than its factorization.

67640661100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14587 (or 14580 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The spelling of 67640661100 in words is "sixty-seven billion, six hundred forty million, six hundred sixty-one thousand, one hundred".