667670385323 has 2 divisors, whose sum is σ = 667670385324. Its totient is φ = 667670385322.

The previous prime is 667670385307. The next prime is 667670385337. The reversal of 667670385323 is 323583076766.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 667670385323 - 2⁴ = 667670385307 is a prime.

It is not a weakly prime, because it can be changed into another prime (667670385523) 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, 333835192661 + 333835192662.

It is an arithmetic number, because the mean of its divisors is an integer number (333835192662).

Almost surely, 2^667670385323 is an apocalyptic number.

667670385323 is a deficient number, since it is larger than the sum of its proper divisors (1).

667670385323 is an equidigital number, since it uses as much as digits as its factorization.

667670385323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22861440, while the sum is 56.

The spelling of 667670385323 in words is "six hundred sixty-seven billion, six hundred seventy million, three hundred eighty-five thousand, three hundred twenty-three".