667441612126 has 4 divisors (see below), whose sum is σ = 1001162418192. Its totient is φ = 333720806062.

The previous prime is 667441612067. The next prime is 667441612127. The reversal of 667441612126 is 621216144766.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667441612127) 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 as a sum of consecutive naturals, namely, 166860403030 + ... + 166860403033.

It is an arithmetic number, because the mean of its divisors is an integer number (250290604548).

Almost surely, 2^667441612126 is an apocalyptic number.

667441612126 is a deficient number, since it is larger than the sum of its proper divisors (333720806066).

667441612126 is a wasteful number, since it uses less digits than its factorization.

667441612126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333720806065.

The product of its digits is 580608, while the sum is 46.

The spelling of 667441612126 in words is "six hundred sixty-seven billion, four hundred forty-one million, six hundred twelve thousand, one hundred twenty-six".