665103280 has 20 divisors (see below), whose sum is σ = 1546365312. Its totient is φ = 266041280.

The previous prime is 665103277. The next prime is 665103287. The reversal of 665103280 is 82301566.

665103280 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 (20).

It is not an unprimeable number, because it can be changed into a prime (665103287) 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, 4156816 + ... + 4156975.

Almost surely, 2^665103280 is an apocalyptic number.

It is an amenable number.

665103280 is an abundant number, since it is smaller than the sum of its proper divisors (881262032).

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

665103280 is a wasteful number, since it uses less digits than its factorization.

665103280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8313804 (or 8313798 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 665103280 is about 25789.5963520176. The cubic root of 665103280 is about 872.8970582178.

The spelling of 665103280 in words is "six hundred sixty-five million, one hundred three thousand, two hundred eighty".