667724475133 has 4 divisors (see below), whose sum is σ = 667731142908. Its totient is φ = 667717807360.

The previous prime is 667724475127. The next prime is 667724475149. The reversal of 667724475133 is 331574427766.

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

It can be written as a sum of positive squares in 2 ways, for example, as 358612938649 + 309111536484 = 598843^2 + 555978^2 .

It is a cyclic number.

It is not a de Polignac number, because 667724475133 - 2²⁹ = 667187604221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667724472133) 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, 3181348 + ... + 3384733.

It is an arithmetic number, because the mean of its divisors is an integer number (166932785727).

Almost surely, 2^667724475133 is an apocalyptic number.

It is an amenable number.

667724475133 is a deficient number, since it is larger than the sum of its proper divisors (6667775).

667724475133 is a wasteful number, since it uses less digits than its factorization.

667724475133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6667774.

The product of its digits is 17781120, while the sum is 55.

The spelling of 667724475133 in words is "six hundred sixty-seven billion, seven hundred twenty-four million, four hundred seventy-five thousand, one hundred thirty-three".