660443167 has 2 divisors, whose sum is σ = 660443168. Its totient is φ = 660443166.

The previous prime is 660443143. The next prime is 660443219. The reversal of 660443167 is 761344066.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 660443167 - 2¹⁹ = 659918879 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (660440167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330221583 + 330221584.

It is an arithmetic number, because the mean of its divisors is an integer number (330221584).

Almost surely, 2^660443167 is an apocalyptic number.

660443167 is a deficient number, since it is larger than the sum of its proper divisors (1).

660443167 is an equidigital number, since it uses as much as digits as its factorization.

660443167 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 660443167 is about 25699.0888359879. The cubic root of 660443167 is about 870.8535978577.

The spelling of 660443167 in words is "six hundred sixty million, four hundred forty-three thousand, one hundred sixty-seven".