6765561005 has 16 divisors (see below), whose sum is σ = 9285072384. Its totient is φ = 4635947520.

The previous prime is 6765560981. The next prime is 6765561007. The reversal of 6765561005 is 5001655676.

It is not a de Polignac number, because 6765561005 - 2⁸ = 6765560749 is a prime.

It is a super-2 number, since 2×6765561005² = 91545631424753220050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6765561007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18116 + ... + 117725.

It is an arithmetic number, because the mean of its divisors is an integer number (580317024).

Almost surely, 2^6765561005 is an apocalyptic number.

It is an amenable number.

6765561005 is a deficient number, since it is larger than the sum of its proper divisors (2519511379).

6765561005 is a wasteful number, since it uses less digits than its factorization.

6765561005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137276.

The product of its (nonzero) digits is 189000, while the sum is 41.

The square root of 6765561005 is about 82253.0303697074. The cubic root of 6765561005 is about 1891.3327297441.

The spelling of 6765561005 in words is "six billion, seven hundred sixty-five million, five hundred sixty-one thousand, five".