6577216566 has 16 divisors (see below), whose sum is σ = 13434315264. Its totient is φ = 2145758504.

The previous prime is 6577216507. The next prime is 6577216601. The reversal of 6577216566 is 6656127756.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11661450 + ... + 11662013.

It is an arithmetic number, because the mean of its divisors is an integer number (839644704).

Almost surely, 2^6577216566 is an apocalyptic number.

6577216566 is an abundant number, since it is smaller than the sum of its proper divisors (6857098698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6577216566 is a wasteful number, since it uses less digits than its factorization.

6577216566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23323515.

The product of its digits is 3175200, while the sum is 51.

The square root of 6577216566 is about 81100.0404808777. The cubic root of 6577216566 is about 1873.6165501888.

The spelling of 6577216566 in words is "six billion, five hundred seventy-seven million, two hundred sixteen thousand, five hundred sixty-six".