6667655249 has 2 divisors, whose sum is σ = 6667655250. Its totient is φ = 6667655248.

The previous prime is 6667655209. The next prime is 6667655261. The reversal of 6667655249 is 9425567666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5357215249 + 1310440000 = 73193^2 + 36200^2 .

It is a cyclic number.

It is not a de Polignac number, because 6667655249 - 2¹² = 6667651153 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6667655194 and 6667655203.

It is not a weakly prime, because it can be changed into another prime (6667655209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3333827624 + 3333827625.

It is an arithmetic number, because the mean of its divisors is an integer number (3333827625).

Almost surely, 2^6667655249 is an apocalyptic number.

It is an amenable number.

6667655249 is a deficient number, since it is larger than the sum of its proper divisors (1).

6667655249 is an equidigital number, since it uses as much as digits as its factorization.

6667655249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16329600, while the sum is 56.

The square root of 6667655249 is about 81655.7116740770. The cubic root of 6667655249 is about 1882.1650823234.

The spelling of 6667655249 in words is "six billion, six hundred sixty-seven million, six hundred fifty-five thousand, two hundred forty-nine".