664231467 has 8 divisors (see below), whose sum is σ = 924148224. Its totient is φ = 423567848.

The previous prime is 664231441. The next prime is 664231471. The reversal of 664231467 is 764132466.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 664231467 - 2¹² = 664227371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (664231417) 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, 4813203 + ... + 4813340.

It is an arithmetic number, because the mean of its divisors is an integer number (115518528).

Almost surely, 2^664231467 is an apocalyptic number.

664231467 is a deficient number, since it is larger than the sum of its proper divisors (259916757).

664231467 is a wasteful number, since it uses less digits than its factorization.

664231467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9626569.

The product of its digits is 145152, while the sum is 39.

The square root of 664231467 is about 25772.6883929481. The cubic root of 664231467 is about 872.5154955472.

Subtracting 664231467 from its reverse (764132466), we obtain a palindrome (99900999).

The spelling of 664231467 in words is "six hundred sixty-four million, two hundred thirty-one thousand, four hundred sixty-seven".