667443468431 has 8 divisors (see below), whose sum is σ = 671753812464. Its totient is φ = 663133872960.

The previous prime is 667443468397. The next prime is 667443468511. The reversal of 667443468431 is 134864344766.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-667443468431 is a prime.

It is a super-2 number, since 2×667443468431² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667443461431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1660571 + ... + 2022963.

It is an arithmetic number, because the mean of its divisors is an integer number (83969226558).

Almost surely, 2^667443468431 is an apocalyptic number.

667443468431 is a deficient number, since it is larger than the sum of its proper divisors (4310344033).

667443468431 is a wasteful number, since it uses less digits than its factorization.

667443468431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374281.

The product of its digits is 27869184, while the sum is 56.

The spelling of 667443468431 in words is "six hundred sixty-seven billion, four hundred forty-three million, four hundred sixty-eight thousand, four hundred thirty-one".