66126667 has 2 divisors, whose sum is σ = 66126668. Its totient is φ = 66126666.

The previous prime is 66126637. The next prime is 66126701. The reversal of 66126667 is 76662166.

66126667 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66126667 - 2¹⁵ = 66093899 is a prime.

It is not a weakly prime, because it can be changed into another prime (66126607) 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, 33063333 + 33063334.

It is an arithmetic number, because the mean of its divisors is an integer number (33063334).

Almost surely, 2^66126667 is an apocalyptic number.

66126667 is a deficient number, since it is larger than the sum of its proper divisors (1).

66126667 is an equidigital number, since it uses as much as digits as its factorization.

66126667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 40.

The square root of 66126667 is about 8131.8304827388. The cubic root of 66126667 is about 404.3823680343.

The spelling of 66126667 in words is "sixty-six million, one hundred twenty-six thousand, six hundred sixty-seven".