665060005 has 4 divisors (see below), whose sum is σ = 798072012. Its totient is φ = 532048000.

The previous prime is 665059963. The next prime is 665060017. The reversal of 665060005 is 500060566.

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 80532676 + 584527329 = 8974^2 + 24177^2 .

It is not a de Polignac number, because 665060005 - 2⁷ = 665059877 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, 66505996 + ... + 66506005.

It is an arithmetic number, because the mean of its divisors is an integer number (199518003).

Almost surely, 2^665060005 is an apocalyptic number.

It is an amenable number.

665060005 is a deficient number, since it is larger than the sum of its proper divisors (133012007).

665060005 is a wasteful number, since it uses less digits than its factorization.

665060005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133012006.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 665060005 is about 25788.7573372584. The cubic root of 665060005 is about 872.8781261008.

The spelling of 665060005 in words is "six hundred sixty-five million, sixty thousand, five".