667422648543 has 16 divisors (see below), whose sum is σ = 1017041253120. Its totient is φ = 381378271296.

The previous prime is 667422648539. The next prime is 667422648547. The reversal of 667422648543 is 345846224766.

It is an interprime number because it is at equal distance from previous prime (667422648539) and next prime (667422648547).

It is not a de Polignac number, because 667422648543 - 2² = 667422648539 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667422648547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1315771 + ... + 1751027.

It is an arithmetic number, because the mean of its divisors is an integer number (63565078320).

Almost surely, 2^667422648543 is an apocalyptic number.

667422648543 is a deficient number, since it is larger than the sum of its proper divisors (349618604577).

667422648543 is a wasteful number, since it uses less digits than its factorization.

667422648543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508286.

The product of its digits is 46448640, while the sum is 57.

The spelling of 667422648543 in words is "six hundred sixty-seven billion, four hundred twenty-two million, six hundred forty-eight thousand, five hundred forty-three".