666242960 has 40 divisors (see below), whose sum is σ = 1550450616. Its totient is φ = 266250240.

The previous prime is 666242933. The next prime is 666242981. The reversal of 666242960 is 69242666.

666242960 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 194658304 + 471584656 = 13952^2 + 21716^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100550 + ... + 106970.

Almost surely, 2^666242960 is an apocalyptic number.

It is an amenable number.

666242960 is an abundant number, since it is smaller than the sum of its proper divisors (884207656).

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

666242960 is a wasteful number, since it uses less digits than its factorization.

666242960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7731 (or 7725 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 41.

The square root of 666242960 is about 25811.6826262838. The cubic root of 666242960 is about 873.3953545812.

The spelling of 666242960 in words is "six hundred sixty-six million, two hundred forty-two thousand, nine hundred sixty".