667138453 has 8 divisors (see below), whose sum is σ = 685532160. Its totient is φ = 648763920.

The previous prime is 667138441. The next prime is 667138477. The reversal of 667138453 is 354831766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 667138453 - 2²¹ = 665041301 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 (667138403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92388 + ... + 99346.

It is an arithmetic number, because the mean of its divisors is an integer number (85691520).

Almost surely, 2^667138453 is an apocalyptic number.

It is an amenable number.

667138453 is a deficient number, since it is larger than the sum of its proper divisors (18393707).

667138453 is a wasteful number, since it uses less digits than its factorization.

667138453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9587.

The product of its digits is 362880, while the sum is 43.

The square root of 667138453 is about 25829.0234619894. The cubic root of 667138453 is about 873.7864878067.

The spelling of 667138453 in words is "six hundred sixty-seven million, one hundred thirty-eight thousand, four hundred fifty-three".