66487223868 has 192 divisors, whose sum is σ = 183653568000. Its totient is φ = 18535136256.

The previous prime is 66487223833. The next prime is 66487223909. The reversal of 66487223868 is 86832278466.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9193678 + ... + 9200906.

It is an arithmetic number, because the mean of its divisors is an integer number (956529000).

Almost surely, 2^66487223868 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 66487223868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91826784000).

66487223868 is an abundant number, since it is smaller than the sum of its proper divisors (117166344132).

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

66487223868 is a wasteful number, since it uses less digits than its factorization.

66487223868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7404 (or 7402 counting only the distinct ones).

The product of its digits is 37158912, while the sum is 60.

The spelling of 66487223868 in words is "sixty-six billion, four hundred eighty-seven million, two hundred twenty-three thousand, eight hundred sixty-eight".