665167637093 has 2 divisors, whose sum is σ = 665167637094. Its totient is φ = 665167637092.

The previous prime is 665167637087. The next prime is 665167637149. The reversal of 665167637093 is 390736761566.

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., 607935208804 + 57232428289 = 779702^2 + 239233^2 .

It is a cyclic number.

It is not a de Polignac number, because 665167637093 - 2⁴ = 665167637077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665167639093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332583818546 + 332583818547.

It is an arithmetic number, because the mean of its divisors is an integer number (332583818547).

Almost surely, 2^665167637093 is an apocalyptic number.

It is an amenable number.

665167637093 is a deficient number, since it is larger than the sum of its proper divisors (1).

665167637093 is an equidigital number, since it uses as much as digits as its factorization.

665167637093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25719120, while the sum is 59.

The spelling of 665167637093 in words is "six hundred sixty-five billion, one hundred sixty-seven million, six hundred thirty-seven thousand, ninety-three".