665333145 has 24 divisors (see below), whose sum is σ = 1156953096. Its totient is φ = 353703168.

The previous prime is 665333143. The next prime is 665333159. The reversal of 665333145 is 541333566.

665333145 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 89189136 + 576144009 = 9444^2 + 24003^2 .

It is not a de Polignac number, because 665333145 - 2¹ = 665333143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (665333143) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9534 + ... + 37703.

It is an arithmetic number, because the mean of its divisors is an integer number (48206379).

Almost surely, 2^665333145 is an apocalyptic number.

It is an amenable number.

665333145 is a deficient number, since it is larger than the sum of its proper divisors (491619951).

665333145 is a wasteful number, since it uses less digits than its factorization.

665333145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47561 (or 47558 counting only the distinct ones).

The product of its digits is 97200, while the sum is 36.

The square root of 665333145 is about 25794.0525121587. The cubic root of 665333145 is about 872.9976066978.

The spelling of 665333145 in words is "six hundred sixty-five million, three hundred thirty-three thousand, one hundred forty-five".