665123341 has 8 divisors (see below), whose sum is σ = 683895960. Its totient is φ = 646581312.

The previous prime is 665123309. The next prime is 665123363. The reversal of 665123341 is 143321566.

It can be written as a sum of positive squares in 4 ways, for example, as 263120841 + 402002500 = 16221^2 + 20050^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 665123341 - 2⁵ = 665123309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665123141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51790 + ... + 63343.

It is an arithmetic number, because the mean of its divisors is an integer number (85486995).

Almost surely, 2^665123341 is an apocalyptic number.

It is an amenable number.

665123341 is a deficient number, since it is larger than the sum of its proper divisors (18772619).

665123341 is a wasteful number, since it uses less digits than its factorization.

665123341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115295.

The product of its digits is 12960, while the sum is 31.

The square root of 665123341 is about 25789.9852849900. The cubic root of 665123341 is about 872.9058343044.

It can be divided in two parts, 6651 and 23341, that added together give a palindrome (29992).

The spelling of 665123341 in words is "six hundred sixty-five million, one hundred twenty-three thousand, three hundred forty-one".