66327968 has 48 divisors (see below), whose sum is σ = 152308800. Its totient is φ = 28421568.

The previous prime is 66327967. The next prime is 66327971. The reversal of 66327968 is 86972366.

It is not an unprimeable number, because it can be changed into a prime (66327967) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7955 + ... + 13997.

It is an arithmetic number, because the mean of its divisors is an integer number (3173100).

Almost surely, 2^66327968 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 66327968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76154400).

66327968 is an abundant number, since it is smaller than the sum of its proper divisors (85980832).

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

66327968 is an equidigital number, since it uses as much as digits as its factorization.

66327968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6074 (or 6052 counting only the distinct ones).

The product of its digits is 653184, while the sum is 47.

The square root of 66327968 is about 8144.1984258735. The cubic root of 66327968 is about 404.7922889583.

The spelling of 66327968 in words is "sixty-six million, three hundred twenty-seven thousand, nine hundred sixty-eight".