66594772608 has 1024 divisors, whose sum is σ = 246758400000. Its totient is φ = 15736799232.

The previous prime is 66594772591. The next prime is 66594772619. The reversal of 66594772608 is 80627749566.

It is a super-2 number, since 2×66594772608² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 748255828 + ... + 748255916.

It is an arithmetic number, because the mean of its divisors is an integer number (240975000).

Almost surely, 2^66594772608 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 66594772608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123379200000).

66594772608 is an abundant number, since it is smaller than the sum of its proper divisors (180163627392).

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

66594772608 is a wasteful number, since it uses less digits than its factorization.

66594772608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182 (or 156 counting only the distinct ones).

The product of its (nonzero) digits is 30481920, while the sum is 60.

The spelling of 66594772608 in words is "sixty-six billion, five hundred ninety-four million, seven hundred seventy-two thousand, six hundred eight".