66356622552 has 128 divisors (see below), whose sum is σ = 182292664320. Its totient is φ = 19961856000.

The previous prime is 66356622539. The next prime is 66356622587. The reversal of 66356622552 is 25522665366.

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, 32320758 + ... + 32322810.

It is an arithmetic number, because the mean of its divisors is an integer number (1424161440).

Almost surely, 2^66356622552 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 66356622552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91146332160).

66356622552 is an abundant number, since it is smaller than the sum of its proper divisors (115936041768).

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

66356622552 is a wasteful number, since it uses less digits than its factorization.

66356622552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2905 (or 2901 counting only the distinct ones).

The product of its digits is 3888000, while the sum is 48.

The spelling of 66356622552 in words is "sixty-six billion, three hundred fifty-six million, six hundred twenty-two thousand, five hundred fifty-two".