667237247993 has 2 divisors, whose sum is σ = 667237247994. Its totient is φ = 667237247992.

The previous prime is 667237247959. The next prime is 667237248023. The reversal of 667237247993 is 399742732766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 644547248569 + 22689999424 = 802837^2 + 150632^2 .

It is a cyclic number.

It is not a de Polignac number, because 667237247993 - 2¹⁶ = 667237182457 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (667237217993) 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, 333618623996 + 333618623997.

It is an arithmetic number, because the mean of its divisors is an integer number (333618623997).

Almost surely, 2^667237247993 is an apocalyptic number.

It is an amenable number.

667237247993 is a deficient number, since it is larger than the sum of its proper divisors (1).

667237247993 is an equidigital number, since it uses as much as digits as its factorization.

667237247993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144027072, while the sum is 65.

The spelling of 667237247993 in words is "six hundred sixty-seven billion, two hundred thirty-seven million, two hundred forty-seven thousand, nine hundred ninety-three".