6661583606 has 8 divisors (see below), whose sum is σ = 10104649560. Its totient is φ = 3293367088.

The previous prime is 6661583581. The next prime is 6661583641. The reversal of 6661583606 is 6063851666.

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

It is a super-2 number, since 2×6661583606² = 88753392279455926472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18712136 + ... + 18712491.

It is an arithmetic number, because the mean of its divisors is an integer number (1263081195).

Almost surely, 2^6661583606 is an apocalyptic number.

6661583606 is a deficient number, since it is larger than the sum of its proper divisors (3443065954).

6661583606 is a wasteful number, since it uses less digits than its factorization.

6661583606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37424718.

The product of its (nonzero) digits is 933120, while the sum is 47.

The square root of 6661583606 is about 81618.5248947811. The cubic root of 6661583606 is about 1881.5936018180.

The spelling of 6661583606 in words is "six billion, six hundred sixty-one million, five hundred eighty-three thousand, six hundred six".