667701043 has 2 divisors, whose sum is σ = 667701044. Its totient is φ = 667701042.

The previous prime is 667701019. The next prime is 667701091. The reversal of 667701043 is 340107766.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 667701043 - 2²⁹ = 130830131 is a prime.

It is not a weakly prime, because it can be changed into another prime (667701943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333850521 + 333850522.

It is an arithmetic number, because the mean of its divisors is an integer number (333850522).

Almost surely, 2^667701043 is an apocalyptic number.

667701043 is a deficient number, since it is larger than the sum of its proper divisors (1).

667701043 is an equidigital number, since it uses as much as digits as its factorization.

667701043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 667701043 is about 25839.9118226050. The cubic root of 667701043 is about 874.0320367481.

The spelling of 667701043 in words is "six hundred sixty-seven million, seven hundred one thousand, forty-three".