666151168 has 36 divisors (see below), whose sum is σ = 1333710000. Its totient is φ = 332071424.

The previous prime is 666151151. The next prime is 666151169. The reversal of 666151168 is 861151666.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 666151168.

It is not an unprimeable number, because it can be changed into a prime (666151169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85083 + ... + 92581.

It is an arithmetic number, because the mean of its divisors is an integer number (37047500).

Almost surely, 2^666151168 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 666151168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (666855000).

666151168 is an abundant number, since it is smaller than the sum of its proper divisors (667558832).

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

666151168 is an equidigital number, since it uses as much as digits as its factorization.

666151168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7862 (or 7848 counting only the distinct ones).

The product of its digits is 51840, while the sum is 40.

The square root of 666151168 is about 25809.9044554605. The cubic root of 666151168 is about 873.3552418929.

The spelling of 666151168 in words is "six hundred sixty-six million, one hundred fifty-one thousand, one hundred sixty-eight".