665115005 has 4 divisors (see below), whose sum is σ = 798138012. Its totient is φ = 532092000.

The previous prime is 665114993. The next prime is 665115019. The reversal of 665115005 is 500511566.

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

It can be written as a sum of positive squares in 2 ways, for example, as 147233956 + 517881049 = 12134^2 + 22757^2 .

It is not a de Polignac number, because 665115005 - 2¹² = 665110909 is a prime.

It is a Duffinian number.

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, 66511496 + ... + 66511505.

It is an arithmetic number, because the mean of its divisors is an integer number (199534503).

Almost surely, 2^665115005 is an apocalyptic number.

It is an amenable number.

665115005 is a deficient number, since it is larger than the sum of its proper divisors (133023007).

665115005 is a wasteful number, since it uses less digits than its factorization.

665115005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133023006.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 665115005 is about 25789.8236713631. The cubic root of 665115005 is about 872.9021875755.

The spelling of 665115005 in words is "six hundred sixty-five million, one hundred fifteen thousand, five".