666275120 has 80 divisors (see below), whose sum is σ = 1786224960. Its totient is φ = 226394112.

The previous prime is 666275117. The next prime is 666275189. The reversal of 666275120 is 21572666.

666275120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (35).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58016 + ... + 68544.

It is an arithmetic number, because the mean of its divisors is an integer number (22327812).

Almost surely, 2^666275120 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 666275120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (893112480).

666275120 is an abundant number, since it is smaller than the sum of its proper divisors (1119949840).

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

666275120 is a wasteful number, since it uses less digits than its factorization.

666275120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10662 (or 10656 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 666275120 is about 25812.3055924882. The cubic root of 666275120 is about 873.4094074840.

The spelling of 666275120 in words is "six hundred sixty-six million, two hundred seventy-five thousand, one hundred twenty".