665644162 has 4 divisors (see below), whose sum is σ = 998466246. Its totient is φ = 332822080.

The previous prime is 665644159. The next prime is 665644207. The reversal of 665644162 is 261446566.

665644162 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 373610241 + 292033921 = 19329^2 + 17089^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166411039 + ... + 166411042.

Almost surely, 2^665644162 is an apocalyptic number.

665644162 is a deficient number, since it is larger than the sum of its proper divisors (332822084).

665644162 is a wasteful number, since it uses less digits than its factorization.

665644162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332822083.

The product of its digits is 207360, while the sum is 40.

The square root of 665644162 is about 25800.0806587886. The cubic root of 665644162 is about 873.1336161550.

The spelling of 665644162 in words is "six hundred sixty-five million, six hundred forty-four thousand, one hundred sixty-two".