664360431 has 8 divisors (see below), whose sum is σ = 1012358784. Its totient is φ = 379634520.

The previous prime is 664360429. The next prime is 664360447. The reversal of 664360431 is 134063466.

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

It is not a de Polignac number, because 664360431 - 2¹ = 664360429 is a prime.

It is a super-2 number, since 2×664360431² = 882749564557011522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 664360392 and 664360401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664360481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15818085 + ... + 15818126.

It is an arithmetic number, because the mean of its divisors is an integer number (126544848).

Almost surely, 2^664360431 is an apocalyptic number.

664360431 is a deficient number, since it is larger than the sum of its proper divisors (347998353).

664360431 is a wasteful number, since it uses less digits than its factorization.

664360431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31636221.

The product of its (nonzero) digits is 31104, while the sum is 33.

The square root of 664360431 is about 25775.1902223825. The cubic root of 664360431 is about 872.5719597029.

The spelling of 664360431 in words is "six hundred sixty-four million, three hundred sixty thousand, four hundred thirty-one".