667194009441 has 4 divisors (see below), whose sum is σ = 889592012592. Its totient is φ = 444796006292.

The previous prime is 667194009437. The next prime is 667194009451. The reversal of 667194009441 is 144900491766.

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 667194009441 - 2² = 667194009437 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (667194009451) 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 in 3 ways as a sum of consecutive naturals, for example, 111199001571 + ... + 111199001576.

It is an arithmetic number, because the mean of its divisors is an integer number (222398003148).

Almost surely, 2^667194009441 is an apocalyptic number.

It is an amenable number.

667194009441 is a deficient number, since it is larger than the sum of its proper divisors (222398003151).

667194009441 is a wasteful number, since it uses less digits than its factorization.

667194009441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222398003150.

The product of its (nonzero) digits is 1306368, while the sum is 51.

The spelling of 667194009441 in words is "six hundred sixty-seven billion, one hundred ninety-four million, nine thousand, four hundred forty-one".