66566552360 has 128 divisors (see below), whose sum is σ = 187078256640. Its totient is φ = 20709561600.

The previous prime is 66566552341. The next prime is 66566552387. The reversal of 66566552360 is 6325566566.

It is a super-2 number, since 2×66566552360² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66566552299 and 66566552308.

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, 1665005 + ... + 1704515.

It is an arithmetic number, because the mean of its divisors is an integer number (1461548880).

Almost surely, 2^66566552360 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 66566552360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93539128320).

66566552360 is an abundant number, since it is smaller than the sum of its proper divisors (120511704280).

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

66566552360 is a wasteful number, since it uses less digits than its factorization.

66566552360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40087 (or 40083 counting only the distinct ones).

The product of its (nonzero) digits is 5832000, while the sum is 50.

The spelling of 66566552360 in words is "sixty-six billion, five hundred sixty-six million, five hundred fifty-two thousand, three hundred sixty".