667233124981 has 2 divisors, whose sum is σ = 667233124982. Its totient is φ = 667233124980.

The previous prime is 667233124973. The next prime is 667233125071. The reversal of 667233124981 is 189421332766.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 333650640625 + 333582484356 = 577625^2 + 577566^2 .

It is a cyclic number.

It is not a de Polignac number, because 667233124981 - 2³ = 667233124973 is a prime.

It is a super-2 number, since 2×667233124981² (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 (667233124381) 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, 333616562490 + 333616562491.

It is an arithmetic number, because the mean of its divisors is an integer number (333616562491).

Almost surely, 2^667233124981 is an apocalyptic number.

It is an amenable number.

667233124981 is a deficient number, since it is larger than the sum of its proper divisors (1).

667233124981 is an equidigital number, since it uses as much as digits as its factorization.

667233124981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2612736, while the sum is 52.

The spelling of 667233124981 in words is "six hundred sixty-seven billion, two hundred thirty-three million, one hundred twenty-four thousand, nine hundred eighty-one".