6655561011 has 12 divisors (see below), whose sum is σ = 10487550840. Its totient is φ = 4033673280.

The previous prime is 6655561001. The next prime is 6655561039. The reversal of 6655561011 is 1101655566.

It is not a de Polignac number, because 6655561011 - 2¹⁹ = 6655036723 is a prime.

It is a super-2 number, since 2×6655561011² = 88592984742286684242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6655561001) 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, 33613846 + ... + 33614043.

It is an arithmetic number, because the mean of its divisors is an integer number (873962570).

Almost surely, 2^6655561011 is an apocalyptic number.

6655561011 is a deficient number, since it is larger than the sum of its proper divisors (3831989829).

6655561011 is a wasteful number, since it uses less digits than its factorization.

6655561011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67227906 (or 67227903 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The square root of 6655561011 is about 81581.6217723085. The cubic root of 6655561011 is about 1881.0263946976.

The spelling of 6655561011 in words is "six billion, six hundred fifty-five million, five hundred sixty-one thousand, eleven".