667452468439 has 4 divisors (see below), whose sum is σ = 668106193720. Its totient is φ = 666798743160.

The previous prime is 667452468409. The next prime is 667452468457. The reversal of 667452468439 is 934864254766.

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 667452468439 - 2⁵ = 667452468407 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 (667452468409) 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, 326861109 + ... + 326863150.

It is an arithmetic number, because the mean of its divisors is an integer number (167026548430).

Almost surely, 2^667452468439 is an apocalyptic number.

667452468439 is a deficient number, since it is larger than the sum of its proper divisors (653725281).

667452468439 is a wasteful number, since it uses less digits than its factorization.

667452468439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653725280.

The product of its digits is 209018880, while the sum is 64.

The spelling of 667452468439 in words is "six hundred sixty-seven billion, four hundred fifty-two million, four hundred sixty-eight thousand, four hundred thirty-nine".