667606633255469 has 2 divisors, whose sum is σ = 667606633255470. Its totient is φ = 667606633255468.

The previous prime is 667606633255339. The next prime is 667606633255531. The reversal of 667606633255469 is 964552336606766.

667606633255469 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 571440897328900 + 96165735926569 = 23904830^2 + 9806413^2 .

It is a cyclic number.

It is not a de Polignac number, because 667606633255469 - 2⁸ = 667606633255213 is a prime.

It is a super-2 number, since 2×667606633255469² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 667606633255396 and 667606633255405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667606633255169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333803316627734 + 333803316627735.

It is an arithmetic number, because the mean of its divisors is an integer number (333803316627735).

Almost surely, 2^{667606633255469} is an apocalyptic number.

It is an amenable number.

667606633255469 is a deficient number, since it is larger than the sum of its proper divisors (1).

667606633255469 is an equidigital number, since it uses as much as digits as its factorization.

667606633255469 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5290790400, while the sum is 74.

The spelling of 667606633255469 in words is "six hundred sixty-seven trillion, six hundred six billion, six hundred thirty-three million, two hundred fifty-five thousand, four hundred sixty-nine".