67612064669 has 2 divisors, whose sum is σ = 67612064670. Its totient is φ = 67612064668.

The previous prime is 67612064629. The next prime is 67612064677. The reversal of 67612064669 is 96646021676.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42636055225 + 24976009444 = 206485^2 + 158038^2 .

It is a cyclic number.

It is not a de Polignac number, because 67612064669 - 2³² = 63317097373 is a prime.

It is a super-2 number, since 2×67612064669² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 67612064669.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67612064629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33806032334 + 33806032335.

It is an arithmetic number, because the mean of its divisors is an integer number (33806032335).

Almost surely, 2^67612064669 is an apocalyptic number.

It is an amenable number.

67612064669 is a deficient number, since it is larger than the sum of its proper divisors (1).

67612064669 is an equidigital number, since it uses as much as digits as its factorization.

67612064669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3919104, while the sum is 53.

The spelling of 67612064669 in words is "sixty-seven billion, six hundred twelve million, sixty-four thousand, six hundred sixty-nine".