665152266 has 64 divisors (see below), whose sum is σ = 1449705600. Its totient is φ = 202752000.

The previous prime is 665152199. The next prime is 665152273. The reversal of 665152266 is 662251566.

It is a happy number.

665152266 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 471370 + ... + 472778.

It is an arithmetic number, because the mean of its divisors is an integer number (22651650).

Almost surely, 2^665152266 is an apocalyptic number.

665152266 is an abundant number, since it is smaller than the sum of its proper divisors (784553334).

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

665152266 is a wasteful number, since it uses less digits than its factorization.

665152266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1575.

The product of its digits is 129600, while the sum is 39.

The square root of 665152266 is about 25790.5460585851. The cubic root of 665152266 is about 872.9184878147.

The spelling of 665152266 in words is "six hundred sixty-five million, one hundred fifty-two thousand, two hundred sixty-six".