667351912289 has 4 divisors (see below), whose sum is σ = 667384628400. Its totient is φ = 667319196180.

The previous prime is 667351912211. The next prime is 667351912379. The reversal of 667351912289 is 982219153766.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 667351912289 - 2¹² = 667351908193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667351912789) 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, 16327439 + ... + 16368260.

It is an arithmetic number, because the mean of its divisors is an integer number (166846157100).

Almost surely, 2^667351912289 is an apocalyptic number.

It is an amenable number.

667351912289 is a deficient number, since it is larger than the sum of its proper divisors (32716111).

667351912289 is a wasteful number, since it uses less digits than its factorization.

667351912289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32716110.

The product of its digits is 9797760, while the sum is 59.

The spelling of 667351912289 in words is "six hundred sixty-seven billion, three hundred fifty-one million, nine hundred twelve thousand, two hundred eighty-nine".