6655666610 has 8 divisors (see below), whose sum is σ = 11980199916. Its totient is φ = 2662266640.

The previous prime is 6655666603. The next prime is 6655666621. The reversal of 6655666610 is 166665566.

It can be written as a sum of positive squares in 2 ways, for example, as 6211173721 + 444492889 = 78811^2 + 21083^2 .

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

It is a Curzon 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 3 ways as a sum of consecutive naturals, for example, 332783321 + ... + 332783340.

Almost surely, 2^6655666610 is an apocalyptic number.

6655666610 is a deficient number, since it is larger than the sum of its proper divisors (5324533306).

6655666610 is a wasteful number, since it uses less digits than its factorization.

6655666610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665566668.

The product of its (nonzero) digits is 1166400, while the sum is 47.

The square root of 6655666610 is about 81582.2689682017. The cubic root of 6655666610 is about 1881.0363429426.

The spelling of 6655666610 in words is "six billion, six hundred fifty-five million, six hundred sixty-six thousand, six hundred ten".