670121662187729 has 2 divisors, whose sum is σ = 670121662187730. Its totient is φ = 670121662187728.

The previous prime is 670121662187693. The next prime is 670121662187843. The reversal of 670121662187729 is 927781266121076.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 529790344980625 + 140331317207104 = 23017175^2 + 11846152^2 .

It is a cyclic number.

It is not a de Polignac number, because 670121662187729 - 2²⁴ = 670121645410513 is a prime.

It is not a weakly prime, because it can be changed into another prime (670121662187429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335060831093864 + 335060831093865.

It is an arithmetic number, because the mean of its divisors is an integer number (335060831093865).

Almost surely, 2^{670121662187729} is an apocalyptic number.

It is an amenable number.

670121662187729 is a deficient number, since it is larger than the sum of its proper divisors (1).

670121662187729 is an equidigital number, since it uses as much as digits as its factorization.

670121662187729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42674688, while the sum is 65.

The spelling of 670121662187729 in words is "six hundred seventy trillion, one hundred twenty-one billion, six hundred sixty-two million, one hundred eighty-seven thousand, seven hundred twenty-nine".