6564660366 has 16 divisors (see below), whose sum is σ = 14322895488. Its totient is φ = 1989291000.

The previous prime is 6564660359. The next prime is 6564660407. The reversal of 6564660366 is 6630664656.

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, 49732210 + ... + 49732341.

It is an arithmetic number, because the mean of its divisors is an integer number (895180968).

Almost surely, 2^6564660366 is an apocalyptic number.

6564660366 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

6564660366 is an abundant number, since it is smaller than the sum of its proper divisors (7758235122).

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

6564660366 is a wasteful number, since it uses less digits than its factorization.

6564660366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99464567.

The product of its (nonzero) digits is 2799360, while the sum is 48.

The square root of 6564660366 is about 81022.5917013274. The cubic root of 6564660366 is about 1872.4235181414.

The spelling of 6564660366 in words is "six billion, five hundred sixty-four million, six hundred sixty thousand, three hundred sixty-six".