6566101613 has 12 divisors (see below), whose sum is σ = 6850084020. Its totient is φ = 6293298816.

The previous prime is 6566101609. The next prime is 6566101621. The reversal of 6566101613 is 3161016656.

It can be written as a sum of positive squares in 6 ways, for example, as 516062089 + 6050039524 = 22717^2 + 77782^2 .

It is not a de Polignac number, because 6566101613 - 2² = 6566101609 is a prime.

It is a super-2 number, since 2×6566101613² = 86227380784482403538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6566101693) 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, 86723 + ... + 143711.

It is an arithmetic number, because the mean of its divisors is an integer number (570840335).

Almost surely, 2^6566101613 is an apocalyptic number.

It is an amenable number.

6566101613 is a deficient number, since it is larger than the sum of its proper divisors (283982407).

6566101613 is a wasteful number, since it uses less digits than its factorization.

6566101613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57184 (or 57155 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 6566101613 is about 81031.4853189796. The cubic root of 6566101613 is about 1872.5605360099.

The spelling of 6566101613 in words is "six billion, five hundred sixty-six million, one hundred one thousand, six hundred thirteen".