666826160 has 240 divisors, whose sum is σ = 2100157248. Its totient is φ = 191600640.

The previous prime is 666826159. The next prime is 666826183. The reversal of 666826160 is 61628666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 880502 + ... + 881258.

Almost surely, 2^666826160 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 666826160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1050078624).

666826160 is an abundant number, since it is smaller than the sum of its proper divisors (1433331088).

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

666826160 is a wasteful number, since it uses less digits than its factorization.

666826160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812 (or 795 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 666826160 is about 25822.9773651297. The cubic root of 666826160 is about 873.6501243116.

The spelling of 666826160 in words is "six hundred sixty-six million, eight hundred twenty-six thousand, one hundred sixty".