66541367568 has 160 divisors (see below), whose sum is σ = 193516503040. Its totient is φ = 19562549760.

The previous prime is 66541367549. The next prime is 66541367569. The reversal of 66541367568 is 86576314566.

66541367568 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (66541367569) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1506405 + ... + 1549947.

It is an arithmetic number, because the mean of its divisors is an integer number (1209478144).

Almost surely, 2^66541367568 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 66541367568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96758251520).

66541367568 is an abundant number, since it is smaller than the sum of its proper divisors (126975135472).

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

66541367568 is a wasteful number, since it uses less digits than its factorization.

66541367568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43677 (or 43671 counting only the distinct ones).

The product of its digits is 21772800, while the sum is 57.

The spelling of 66541367568 in words is "sixty-six billion, five hundred forty-one million, three hundred sixty-seven thousand, five hundred sixty-eight".