6656655923 has 2 divisors, whose sum is σ = 6656655924. Its totient is φ = 6656655922.

The previous prime is 6656655917. The next prime is 6656655931. The reversal of 6656655923 is 3295566566.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6656655923 - 2⁸ = 6656655667 is a prime.

It is a super-2 number, since 2×6656655923² = 88622136154421963858, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6656654923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3328327961 + 3328327962.

It is an arithmetic number, because the mean of its divisors is an integer number (3328327962).

Almost surely, 2^6656655923 is an apocalyptic number.

6656655923 is a deficient number, since it is larger than the sum of its proper divisors (1).

6656655923 is an equidigital number, since it uses as much as digits as its factorization.

6656655923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8748000, while the sum is 53.

The square root of 6656655923 is about 81588.3320273187. The cubic root of 6656655923 is about 1881.1295387921.

The spelling of 6656655923 in words is "six billion, six hundred fifty-six million, six hundred fifty-five thousand, nine hundred twenty-three".