660510005 has 8 divisors (see below), whose sum is σ = 793449432. Its totient is φ = 527849728.

The previous prime is 660509999. The next prime is 660510047. The reversal of 660510005 is 500015066.

It can be written as a sum of positive squares in 4 ways, for example, as 88774084 + 571735921 = 9422^2 + 23911^2 .

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 660510005 - 2¹⁴ = 660493621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64544 + ... + 74073.

It is an arithmetic number, because the mean of its divisors is an integer number (99181179).

Almost surely, 2^660510005 is an apocalyptic number.

It is an amenable number.

660510005 is a deficient number, since it is larger than the sum of its proper divisors (132939427).

660510005 is a wasteful number, since it uses less digits than its factorization.

660510005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139575.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 660510005 is about 25700.3891993876. The cubic root of 660510005 is about 870.8829741676.

The spelling of 660510005 in words is "six hundred sixty million, five hundred ten thousand, five".