6677729 has 2 divisors, whose sum is σ = 6677730. Its totient is φ = 6677728.

The previous prime is 6677707. The next prime is 6677747. The reversal of 6677729 is 9277766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6477025 + 200704 = 2545^2 + 448^2 .

It is a cyclic number.

It is not a de Polignac number, because 6677729 - 2¹² = 6673633 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6677729.

It is not a weakly prime, because it can be changed into another prime (6677789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3338864 + 3338865.

It is an arithmetic number, because the mean of its divisors is an integer number (3338865).

Almost surely, 2^6677729 is an apocalyptic number.

It is an amenable number.

6677729 is a deficient number, since it is larger than the sum of its proper divisors (1).

6677729 is an equidigital number, since it uses as much as digits as its factorization.

6677729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 222264, while the sum is 44.

The square root of 6677729 is about 2584.1302211769. The cubic root of 6677729 is about 188.3112487918.

Subtracting from 6677729 its sum of digits (44), we obtain a triangular number (6677685 = T₃₆₅₄).

The spelling of 6677729 in words is "six million, six hundred seventy-seven thousand, seven hundred twenty-nine".