6655729 has 2 divisors, whose sum is σ = 6655730. Its totient is φ = 6655728.

The previous prime is 6655723. The next prime is 6655739. The reversal of 6655729 is 9275566.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4524129 + 2131600 = 2127^2 + 1460^2 .

It is a cyclic number.

It is not a de Polignac number, because 6655729 - 2¹⁵ = 6622961 is a prime.

6655729 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6655691 and 6655700.

It is not a weakly prime, because it can be changed into another prime (6655723) 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, 3327864 + 3327865.

It is an arithmetic number, because the mean of its divisors is an integer number (3327865).

Almost surely, 2^6655729 is an apocalyptic number.

It is an amenable number.

6655729 is a deficient number, since it is larger than the sum of its proper divisors (1).

6655729 is an equidigital number, since it uses as much as digits as its factorization.

6655729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 113400, while the sum is 40.

The square root of 6655729 is about 2579.8699579630. The cubic root of 6655729 is about 188.1042220515.

The spelling of 6655729 in words is "six million, six hundred fifty-five thousand, seven hundred twenty-nine".