667233260861 has 2 divisors, whose sum is σ = 667233260862. Its totient is φ = 667233260860.

The previous prime is 667233260803. The next prime is 667233260879. The reversal of 667233260861 is 168062332766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 524855331961 + 142377928900 = 724469^2 + 377330^2 .

It is a cyclic number.

It is not a de Polignac number, because 667233260861 - 2²⁶ = 667166151997 is a prime.

It is a super-2 number, since 2×667233260861² (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 (667233268861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333616630430 + 333616630431.

It is an arithmetic number, because the mean of its divisors is an integer number (333616630431).

Almost surely, 2^667233260861 is an apocalyptic number.

It is an amenable number.

667233260861 is a deficient number, since it is larger than the sum of its proper divisors (1).

667233260861 is an equidigital number, since it uses as much as digits as its factorization.

667233260861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2612736, while the sum is 50.

The spelling of 667233260861 in words is "six hundred sixty-seven billion, two hundred thirty-three million, two hundred sixty thousand, eight hundred sixty-one".