6656123331 has 48 divisors (see below), whose sum is σ = 11431510272. Its totient is φ = 3678782400.

The previous prime is 6656123317. The next prime is 6656123359. The reversal of 6656123331 is 1333216566.

6656123331 is a `hidden beast` number, since 6 + 6 + 5 + 612 + 3 + 3 + 31 = 666.

It is not a de Polignac number, because 6656123331 - 2²¹ = 6654026179 is a prime.

It is a super-2 number, since 2×6656123331² = 88607955594965071122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (6656123431) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 75666 + ... + 137976.

It is an arithmetic number, because the mean of its divisors is an integer number (238156464).

Almost surely, 2^6656123331 is an apocalyptic number.

6656123331 is a deficient number, since it is larger than the sum of its proper divisors (4775386941).

6656123331 is a wasteful number, since it uses less digits than its factorization.

6656123331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62424 (or 62421 counting only the distinct ones).

The product of its digits is 58320, while the sum is 36.

The square root of 6656123331 is about 81585.0680639540. The cubic root of 6656123331 is about 1881.0793683924.

Adding to 6656123331 its reverse (1333216566), we get a palindrome (7989339897).

The spelling of 6656123331 in words is "six billion, six hundred fifty-six million, one hundred twenty-three thousand, three hundred thirty-one".