5665206511 has 4 divisors (see below), whose sum is σ = 5744998224. Its totient is φ = 5585414800.

The previous prime is 5665206509. The next prime is 5665206541. The reversal of 5665206511 is 1156025665.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 5665206511 - 2¹ = 5665206509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5665206541) by changing a digit.

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, 39895750 + ... + 39895891.

It is an arithmetic number, because the mean of its divisors is an integer number (1436249556).

Almost surely, 2^5665206511 is an apocalyptic number.

5665206511 is a deficient number, since it is larger than the sum of its proper divisors (79791713).

5665206511 is an equidigital number, since it uses as much as digits as its factorization.

5665206511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79791712.

The product of its (nonzero) digits is 54000, while the sum is 37.

The square root of 5665206511 is about 75267.5661291104. The cubic root of 5665206511 is about 1782.6739375490.

The spelling of 5665206511 in words is "five billion, six hundred sixty-five million, two hundred six thousand, five hundred eleven".