505660005 has 24 divisors (see below), whose sum is σ = 896863968. Its totient is φ = 263412576.

The previous prime is 505659967. The next prime is 505660027. The reversal of 505660005 is 500066505.

505660005 is a `hidden beast` number, since 5 + 0 + 56 + 600 + 0 + 5 = 666.

It is not a de Polignac number, because 505660005 - 2⁹ = 505659493 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 128727 + ... + 132596.

It is an arithmetic number, because the mean of its divisors is an integer number (37369332).

Almost surely, 2^505660005 is an apocalyptic number.

It is an amenable number.

505660005 is a deficient number, since it is larger than the sum of its proper divisors (391203963).

505660005 is a wasteful number, since it uses less digits than its factorization.

505660005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261377 (or 261374 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 505660005 is about 22486.8851778098. The cubic root of 505660005 is about 796.6841950552.

The spelling of 505660005 in words is "five hundred five million, six hundred sixty thousand, five".