66220872102 has 192 divisors, whose sum is σ = 192892976640. Its totient is φ = 15897254400.

The previous prime is 66220872071. The next prime is 66220872131. The reversal of 66220872102 is 20127802266.

66220872102 is a `hidden beast` number, since 6 + 622 + 0 + 8 + 7 + 21 + 0 + 2 = 666.

66220872102 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1049028 + ... + 1110360.

It is an arithmetic number, because the mean of its divisors is an integer number (1004650920).

Almost surely, 2^66220872102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66220872102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96446488320).

66220872102 is an abundant number, since it is smaller than the sum of its proper divisors (126672104538).

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

66220872102 is a wasteful number, since it uses less digits than its factorization.

66220872102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61419 (or 61416 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The spelling of 66220872102 in words is "sixty-six billion, two hundred twenty million, eight hundred seventy-two thousand, one hundred two".