6656665611063 has 32 divisors (see below), whose sum is σ = 9646543244800. Its totient is φ = 4058590790016.

The previous prime is 6656665611061. The next prime is 6656665611121. The reversal of 6656665611063 is 3601165666566.

It is a happy number.

It is not a de Polignac number, because 6656665611063 - 2¹ = 6656665611061 is a prime.

It is a super-3 number, since 3×6656665611063³ (a number of 39 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6656665610994 and 6656665611012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6656665611061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 96918228 + ... + 96986886.

It is an arithmetic number, because the mean of its divisors is an integer number (301454476400).

Almost surely, 2^{6656665611063} is an apocalyptic number.

6656665611063 is a deficient number, since it is larger than the sum of its proper divisors (2989877633737).

6656665611063 is a wasteful number, since it uses less digits than its factorization.

6656665611063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91591.

The product of its (nonzero) digits is 20995200, while the sum is 57.

The spelling of 6656665611063 in words is "six trillion, six hundred fifty-six billion, six hundred sixty-five million, six hundred eleven thousand, sixty-three".