6645192566 has 8 divisors (see below), whose sum is σ = 10199598024. Its totient is φ = 3245326560.

The previous prime is 6645192557. The next prime is 6645192649. The reversal of 6645192566 is 6652915466.

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

It is a congruent 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, 38634755 + ... + 38634926.

It is an arithmetic number, because the mean of its divisors is an integer number (1274949753).

Almost surely, 2^6645192566 is an apocalyptic number.

6645192566 is a deficient number, since it is larger than the sum of its proper divisors (3554405458).

6645192566 is a wasteful number, since it uses less digits than its factorization.

6645192566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77269726.

The product of its digits is 2332800, while the sum is 50.

The square root of 6645192566 is about 81518.0505532364. The cubic root of 6645192566 is about 1880.0490938968.

The spelling of 6645192566 in words is "six billion, six hundred forty-five million, one hundred ninety-two thousand, five hundred sixty-six".