667653532771 has 2 divisors, whose sum is σ = 667653532772. Its totient is φ = 667653532770.

The previous prime is 667653532747. The next prime is 667653532781. The reversal of 667653532771 is 177235356766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 667653532771 - 2¹¹ = 667653530723 is a prime.

It is a super-2 number, since 2×667653532771² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (667653532781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333826766385 + 333826766386.

It is an arithmetic number, because the mean of its divisors is an integer number (333826766386).

Almost surely, 2^667653532771 is an apocalyptic number.

667653532771 is a deficient number, since it is larger than the sum of its proper divisors (1).

667653532771 is an equidigital number, since it uses as much as digits as its factorization.

667653532771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 33339600, while the sum is 58.

The spelling of 667653532771 in words is "six hundred sixty-seven billion, six hundred fifty-three million, five hundred thirty-two thousand, seven hundred seventy-one".