665837228162 has 18 divisors (see below), whose sum is σ = 1002855923433. Its totient is φ = 331557492312.

The previous prime is 665837228149. The next prime is 665837228167. The reversal of 665837228162 is 261822738566.

It can be written as a sum of positive squares in 2 ways, for example, as 584400620521 + 81436607641 = 764461^2 + 285371^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=576991.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 665837228098 and 665837228107.

It is not an unprimeable number, because it can be changed into a prime (665837228167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 319651973 + ... + 319654055.

Almost surely, 2^665837228162 is an apocalyptic number.

665837228162 is a deficient number, since it is larger than the sum of its proper divisors (337018695271).

665837228162 is an frugal number, since it uses more digits than its factorization.

665837228162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4722 (or 2362 counting only the distinct ones).

The product of its digits is 11612160, while the sum is 56.

The spelling of 665837228162 in words is "six hundred sixty-five billion, eight hundred thirty-seven million, two hundred twenty-eight thousand, one hundred sixty-two".