1066644167 has 2 divisors, whose sum is σ = 1066644168. Its totient is φ = 1066644166.

The previous prime is 1066644149. The next prime is 1066644169. The reversal of 1066644167 is 7614466601.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1066644167 - 2¹⁰ = 1066643143 is a prime.

It is a super-2 number, since 2×1066644167² = 2275459557990247778, which contains 22 as substring.

Together with 1066644169, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1066644169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 533322083 + 533322084.

It is an arithmetic number, because the mean of its divisors is an integer number (533322084).

Almost surely, 2^1066644167 is an apocalyptic number.

1066644167 is a deficient number, since it is larger than the sum of its proper divisors (1).

1066644167 is an equidigital number, since it uses as much as digits as its factorization.

1066644167 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 1066644167 is about 32659.5187809006. The cubic root of 1066644167 is about 1021.7387257631.

The spelling of 1066644167 in words is "one billion, sixty-six million, six hundred forty-four thousand, one hundred sixty-seven".