665115434132 has 12 divisors (see below), whose sum is σ = 1163958168660. Its totient is φ = 332555957376.

The previous prime is 665115434107. The next prime is 665115434141. The reversal of 665115434132 is 231434511566.

It can be written as a sum of positive squares in 2 ways, for example, as 619803500176 + 45311933956 = 787276^2 + 212866^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 665115434132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 796844 + ... + 1401852.

It is an arithmetic number, because the mean of its divisors is an integer number (96996514055).

Almost surely, 2^665115434132 is an apocalyptic number.

It is an amenable number.

665115434132 is a deficient number, since it is larger than the sum of its proper divisors (498842734528).

665115434132 is a wasteful number, since it uses less digits than its factorization.

665115434132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879850 (or 879848 counting only the distinct ones).

The product of its digits is 259200, while the sum is 41.

Adding to 665115434132 its reverse (231434511566), we get a palindrome (896549945698).

The spelling of 665115434132 in words is "six hundred sixty-five billion, one hundred fifteen million, four hundred thirty-four thousand, one hundred thirty-two".