67667662669 has 2 divisors, whose sum is σ = 67667662670. Its totient is φ = 67667662668.

The previous prime is 67667662627. The next prime is 67667662681. The reversal of 67667662669 is 96626676676.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64701553225 + 2966109444 = 254365^2 + 54462^2 .

It is a cyclic number.

It is not a de Polignac number, because 67667662669 - 2⁷ = 67667662541 is a prime.

It is a super-2 number, since 2×67667662669² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67667662369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33833831334 + 33833831335.

It is an arithmetic number, because the mean of its divisors is an integer number (33833831335).

Almost surely, 2^67667662669 is an apocalyptic number.

It is an amenable number.

67667662669 is a deficient number, since it is larger than the sum of its proper divisors (1).

67667662669 is an equidigital number, since it uses as much as digits as its factorization.

67667662669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 246903552, while the sum is 67.

The spelling of 67667662669 in words is "sixty-seven billion, six hundred sixty-seven million, six hundred sixty-two thousand, six hundred sixty-nine".