667945738895 has 8 divisors (see below), whose sum is σ = 801669566256. Its totient is φ = 534266804736.

The previous prime is 667945738883. The next prime is 667945738907. The reversal of 667945738895 is 598837549766.

It is an interprime number because it is at equal distance from previous prime (667945738883) and next prime (667945738907).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 667945738895 - 2¹⁰ = 667945737871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 11190557 + ... + 11250086.

It is an arithmetic number, because the mean of its divisors is an integer number (100208695782).

Almost surely, 2^667945738895 is an apocalyptic number.

667945738895 is a deficient number, since it is larger than the sum of its proper divisors (133723827361).

667945738895 is a wasteful number, since it uses less digits than its factorization.

667945738895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22446601.

The product of its digits is 2743372800, while the sum is 77.

The spelling of 667945738895 in words is "six hundred sixty-seven billion, nine hundred forty-five million, seven hundred thirty-eight thousand, eight hundred ninety-five".