667147423 has 4 divisors (see below), whose sum is σ = 678084328. Its totient is φ = 656210520.

The previous prime is 667147421. The next prime is 667147433. The reversal of 667147423 is 324741766.

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

It is a cyclic number.

It is not a de Polignac number, because 667147423 - 2¹ = 667147421 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 (667147421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5468361 + ... + 5468482.

It is an arithmetic number, because the mean of its divisors is an integer number (169521082).

Almost surely, 2^667147423 is an apocalyptic number.

667147423 is a deficient number, since it is larger than the sum of its proper divisors (10936905).

667147423 is a wasteful number, since it uses less digits than its factorization.

667147423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10936904.

The product of its digits is 169344, while the sum is 40.

The square root of 667147423 is about 25829.1971032783. The cubic root of 667147423 is about 873.7904039501.

The spelling of 667147423 in words is "six hundred sixty-seven million, one hundred forty-seven thousand, four hundred twenty-three".