667430573 has 4 divisors (see below), whose sum is σ = 667525920. Its totient is φ = 667335228.

The previous prime is 667430549. The next prime is 667430609. The reversal of 667430573 is 375034766.

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, and also an emirpimes, since its reverse is a distinct semiprime: 375034766 = 2 ⋅187517383.

It is a cyclic number.

It is not a de Polignac number, because 667430573 - 2⁶ = 667430509 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 667430573.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667430173) 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, 36263 + ... + 51476.

It is an arithmetic number, because the mean of its divisors is an integer number (166881480).

Almost surely, 2^667430573 is an apocalyptic number.

It is an amenable number.

667430573 is a deficient number, since it is larger than the sum of its proper divisors (95347).

667430573 is an equidigital number, since it uses as much as digits as its factorization.

667430573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95346.

The product of its (nonzero) digits is 317520, while the sum is 41.

The square root of 667430573 is about 25834.6777220077. The cubic root of 667430573 is about 873.9140041971.

The spelling of 667430573 in words is "six hundred sixty-seven million, four hundred thirty thousand, five hundred seventy-three".