667216232677 has 2 divisors, whose sum is σ = 667216232678. Its totient is φ = 667216232676.

The previous prime is 667216232651. The next prime is 667216232681. The reversal of 667216232677 is 776232612766.

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., 594377779681 + 72838452996 = 770959^2 + 269886^2 .

It is a cyclic number.

It is not a de Polignac number, because 667216232677 - 2⁷ = 667216232549 is a prime.

It is a super-2 number, since 2×667216232677² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667216232377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333608116338 + 333608116339.

It is an arithmetic number, because the mean of its divisors is an integer number (333608116339).

Almost surely, 2^667216232677 is an apocalyptic number.

It is an amenable number.

667216232677 is a deficient number, since it is larger than the sum of its proper divisors (1).

667216232677 is an equidigital number, since it uses as much as digits as its factorization.

667216232677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10668672, while the sum is 55.

The spelling of 667216232677 in words is "six hundred sixty-seven billion, two hundred sixteen million, two hundred thirty-two thousand, six hundred seventy-seven".