667888890037 has 2 divisors, whose sum is σ = 667888890038. Its totient is φ = 667888890036.

The previous prime is 667888889999. The next prime is 667888890041. The reversal of 667888890037 is 730098888766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 667438346961 + 450543076 = 816969^2 + 21226^2 .

It is a cyclic number.

It is not a de Polignac number, because 667888890037 - 2⁷ = 667888889909 is a prime.

It is a super-2 number, since 2×667888890037² (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 (667888890047) 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, 333944445018 + 333944445019.

It is an arithmetic number, because the mean of its divisors is an integer number (333944445019).

Almost surely, 2^667888890037 is an apocalyptic number.

It is an amenable number.

667888890037 is a deficient number, since it is larger than the sum of its proper divisors (1).

667888890037 is an equidigital number, since it uses as much as digits as its factorization.

667888890037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 195084288, while the sum is 70.

The spelling of 667888890037 in words is "six hundred sixty-seven billion, eight hundred eighty-eight million, eight hundred ninety thousand, thirty-seven".