667490673 has 4 divisors (see below), whose sum is σ = 889987568. Its totient is φ = 444993780.

The previous prime is 667490657. The next prime is 667490683. The reversal of 667490673 is 376094766.

667490673 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 667490673 - 2⁴ = 667490657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667490623) 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, 111248443 + ... + 111248448.

It is an arithmetic number, because the mean of its divisors is an integer number (222496892).

Almost surely, 2^667490673 is an apocalyptic number.

It is an amenable number.

667490673 is a deficient number, since it is larger than the sum of its proper divisors (222496895).

667490673 is a wasteful number, since it uses less digits than its factorization.

667490673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222496894.

The product of its (nonzero) digits is 1143072, while the sum is 48.

The square root of 667490673 is about 25835.8408610984. The cubic root of 667490673 is about 873.9402344685.

The spelling of 667490673 in words is "six hundred sixty-seven million, four hundred ninety thousand, six hundred seventy-three".