667873420061 has 2 divisors, whose sum is σ = 667873420062. Its totient is φ = 667873420060.

The previous prime is 667873420021. The next prime is 667873420069. The reversal of 667873420061 is 160024378766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 667498804036 + 374616025 = 817006^2 + 19355^2 .

It is a cyclic number.

It is not a de Polignac number, because 667873420061 - 2²² = 667869225757 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 667873419991 and 667873420009.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667873420069) 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, 333936710030 + 333936710031.

It is an arithmetic number, because the mean of its divisors is an integer number (333936710031).

Almost surely, 2^667873420061 is an apocalyptic number.

It is an amenable number.

667873420061 is a deficient number, since it is larger than the sum of its proper divisors (1).

667873420061 is an equidigital number, since it uses as much as digits as its factorization.

667873420061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2032128, while the sum is 50.

The spelling of 667873420061 in words is "six hundred sixty-seven billion, eight hundred seventy-three million, four hundred twenty thousand, sixty-one".