6661660522 has 16 divisors (see below), whose sum is σ = 11374852032. Its totient is φ = 2896373920.

The previous prime is 6661660517. The next prime is 6661660541. The reversal of 6661660522 is 2250661666.

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, 6582163 + ... + 6583174.

It is an arithmetic number, because the mean of its divisors is an integer number (710928252).

Almost surely, 2^6661660522 is an apocalyptic number.

6661660522 is a deficient number, since it is larger than the sum of its proper divisors (4713191510).

6661660522 is a wasteful number, since it uses less digits than its factorization.

6661660522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13165373.

The product of its (nonzero) digits is 155520, while the sum is 40.

The square root of 6661660522 is about 81618.9960854702. The cubic root of 6661660522 is about 1881.6008435443.

The spelling of 6661660522 in words is "six billion, six hundred sixty-one million, six hundred sixty thousand, five hundred twenty-two".