6660346505 has 16 divisors (see below), whose sum is σ = 8262822144. Its totient is φ = 5149915200.

The previous prime is 6660346499. The next prime is 6660346523. The reversal of 6660346505 is 5056430666.

It is a happy number.

It is not a de Polignac number, because 6660346505 - 2¹⁴ = 6660330121 is a prime.

It is a Duffinian 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 15 ways as a sum of consecutive naturals, for example, 91277 + ... + 147146.

It is an arithmetic number, because the mean of its divisors is an integer number (516426384).

Almost surely, 2^6660346505 is an apocalyptic number.

It is an amenable number.

6660346505 is a deficient number, since it is larger than the sum of its proper divisors (1602475639).

6660346505 is a wasteful number, since it uses less digits than its factorization.

6660346505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238616.

The product of its (nonzero) digits is 388800, while the sum is 41.

The square root of 6660346505 is about 81610.9459876554. The cubic root of 6660346505 is about 1881.4771197335.

The spelling of 6660346505 in words is "six billion, six hundred sixty million, three hundred forty-six thousand, five hundred five".