6660622505 has 8 divisors (see below), whose sum is σ = 8010087624. Its totient is φ = 5316937600.

The previous prime is 6660622481. The next prime is 6660622511. The reversal of 6660622505 is 5052260666.

It can be written as a sum of positive squares in 4 ways, for example, as 1849258009 + 4811364496 = 43003^2 + 69364^2 .

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

It is not a de Polignac number, because 6660622505 - 2¹⁰ = 6660621481 is a prime.

It is a super-2 number, since 2×6660622505² = 88727784308224950050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1442516 + ... + 1447125.

It is an arithmetic number, because the mean of its divisors is an integer number (1001260953).

Almost surely, 2^6660622505 is an apocalyptic number.

It is an amenable number.

6660622505 is a deficient number, since it is larger than the sum of its proper divisors (1349465119).

6660622505 is a wasteful number, since it uses less digits than its factorization.

6660622505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2890107.

The product of its (nonzero) digits is 129600, while the sum is 38.

The square root of 6660622505 is about 81612.6369197810. The cubic root of 6660622505 is about 1881.5031083970.

The spelling of 6660622505 in words is "six billion, six hundred sixty million, six hundred twenty-two thousand, five hundred five".