6550661011 has 4 divisors (see below), whose sum is σ = 6594043024. Its totient is φ = 6507279000.

The previous prime is 6550661009. The next prime is 6550661071. The reversal of 6550661011 is 1101660556.

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 6550661011 - 2¹ = 6550661009 is a prime.

It is a super-2 number, since 2×6550661011² = 85822319362071084242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6550661071) 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, 21690780 + ... + 21691081.

It is an arithmetic number, because the mean of its divisors is an integer number (1648510756).

Almost surely, 2^6550661011 is an apocalyptic number.

6550661011 is a deficient number, since it is larger than the sum of its proper divisors (43382013).

6550661011 is a wasteful number, since it uses less digits than its factorization.

6550661011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43382012.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 6550661011 is about 80936.1539177641. The cubic root of 6550661011 is about 1871.0915692235.

The spelling of 6550661011 in words is "six billion, five hundred fifty million, six hundred sixty-one thousand, eleven".