664131463 has 12 divisors (see below), whose sum is σ = 713047048. Its totient is φ = 618068880.

The previous prime is 664131451. The next prime is 664131467. The reversal of 664131463 is 364131466.

It is a de Polignac number, because none of the positive numbers 2^k-664131463 is a prime.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664131467) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2608 + ... + 36538.

Almost surely, 2^664131463 is an apocalyptic number.

664131463 is a deficient number, since it is larger than the sum of its proper divisors (48915585).

664131463 is a wasteful number, since it uses less digits than its factorization.

664131463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34014 (or 33991 counting only the distinct ones).

The product of its digits is 31104, while the sum is 34.

The square root of 664131463 is about 25770.7482041170. The cubic root of 664131463 is about 872.4717058829.

It can be divided in two parts, 66413 and 1463, that added together give a palindrome (67876).

The spelling of 664131463 in words is "six hundred sixty-four million, one hundred thirty-one thousand, four hundred sixty-three".