667139709433 has 2 divisors, whose sum is σ = 667139709434. Its totient is φ = 667139709432.

The previous prime is 667139709419. The next prime is 667139709469. The reversal of 667139709433 is 334907931766.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 608949243904 + 58190465529 = 780352^2 + 241227^2 .

It is a cyclic number.

It is not a de Polignac number, because 667139709433 - 2¹⁷ = 667139578361 is a prime.

It is not a weakly prime, because it can be changed into another prime (667139709473) 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, 333569854716 + 333569854717.

It is an arithmetic number, because the mean of its divisors is an integer number (333569854717).

Almost surely, 2^667139709433 is an apocalyptic number.

It is an amenable number.

667139709433 is a deficient number, since it is larger than the sum of its proper divisors (1).

667139709433 is an equidigital number, since it uses as much as digits as its factorization.

667139709433 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15431472, while the sum is 58.

The spelling of 667139709433 in words is "six hundred sixty-seven billion, one hundred thirty-nine million, seven hundred nine thousand, four hundred thirty-three".