6446159566 has 24 divisors (see below), whose sum is σ = 12146485680. Its totient is φ = 2511490080.

The previous prime is 6446159563. The next prime is 6446159597. The reversal of 6446159566 is 6659516446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6446159563) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1900951 + ... + 1904338.

It is an arithmetic number, because the mean of its divisors is an integer number (506103570).

Almost surely, 2^6446159566 is an apocalyptic number.

6446159566 is a deficient number, since it is larger than the sum of its proper divisors (5700326114).

6446159566 is a wasteful number, since it uses less digits than its factorization.

6446159566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3805320 (or 3805309 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 52.

The square root of 6446159566 is about 80287.9789632296. The cubic root of 6446159566 is about 1861.0884643484.

The spelling of 6446159566 in words is "six billion, four hundred forty-six million, one hundred fifty-nine thousand, five hundred sixty-six".