667233111761 has 2 divisors, whose sum is σ = 667233111762. Its totient is φ = 667233111760.

The previous prime is 667233111757. The next prime is 667233111763. The reversal of 667233111761 is 167111332766.

667233111761 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., 647872059025 + 19361052736 = 804905^2 + 139144^2 .

It is a cyclic number.

It is not a de Polignac number, because 667233111761 - 2² = 667233111757 is a prime.

It is a super-2 number, since 2×667233111761² (a number of 24 digits) contains 22 as substring.

Together with 667233111763, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (667233111763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333616555880 + 333616555881.

It is an arithmetic number, because the mean of its divisors is an integer number (333616555881).

Almost surely, 2^667233111761 is an apocalyptic number.

It is an amenable number.

667233111761 is a deficient number, since it is larger than the sum of its proper divisors (1).

667233111761 is an equidigital number, since it uses as much as digits as its factorization.

667233111761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 44.

The spelling of 667233111761 in words is "six hundred sixty-seven billion, two hundred thirty-three million, one hundred eleven thousand, seven hundred sixty-one".