667405435129 has 2 divisors, whose sum is σ = 667405435130. Its totient is φ = 667405435128.

The previous prime is 667405435069. The next prime is 667405435139. The reversal of 667405435129 is 921534504766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 660091251600 + 7314183529 = 812460^2 + 85523^2 .

It is a cyclic number.

It is not a de Polignac number, because 667405435129 - 2⁷ = 667405435001 is a prime.

It is a super-3 number, since 3×667405435129³ (a number of 36 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (667405435139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333702717564 + 333702717565.

It is an arithmetic number, because the mean of its divisors is an integer number (333702717565).

Almost surely, 2^667405435129 is an apocalyptic number.

It is an amenable number.

667405435129 is a deficient number, since it is larger than the sum of its proper divisors (1).

667405435129 is an equidigital number, since it uses as much as digits as its factorization.

667405435129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5443200, while the sum is 52.

The spelling of 667405435129 in words is "six hundred sixty-seven billion, four hundred five million, four hundred thirty-five thousand, one hundred twenty-nine".