667901117243 has 4 divisors (see below), whose sum is σ = 682111779360. Its totient is φ = 653690455128.

The previous prime is 667901117237. The next prime is 667901117281. The reversal of 667901117243 is 342711109766.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 667901117243 - 2¹⁰ = 667901116219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47), and also a Moran number because the ratio is a prime number: 14210662069 = 667901117243 / (6 + 6 + 7 + 9 + 0 + 1 + 1 + 1 + 7 + 2 + 4 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667901116243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7105330988 + ... + 7105331081.

It is an arithmetic number, because the mean of its divisors is an integer number (170527944840).

Almost surely, 2^667901117243 is an apocalyptic number.

667901117243 is a deficient number, since it is larger than the sum of its proper divisors (14210662117).

667901117243 is a wasteful number, since it uses less digits than its factorization.

667901117243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14210662116.

The product of its (nonzero) digits is 381024, while the sum is 47.

The spelling of 667901117243 in words is "six hundred sixty-seven billion, nine hundred one million, one hundred seventeen thousand, two hundred forty-three".