664115434 has 4 divisors (see below), whose sum is σ = 996173154. Its totient is φ = 332057716.

The previous prime is 664115429. The next prime is 664115437. The reversal of 664115434 is 434511466.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 577681225 + 86434209 = 24035^2 + 9297^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 664115434.

It is not an unprimeable number, because it can be changed into a prime (664115437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166028857 + ... + 166028860.

Almost surely, 2^664115434 is an apocalyptic number.

664115434 is a deficient number, since it is larger than the sum of its proper divisors (332057720).

664115434 is a wasteful number, since it uses less digits than its factorization.

664115434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332057719.

The product of its digits is 34560, while the sum is 34.

The square root of 664115434 is about 25770.4372101057. The cubic root of 664115434 is about 872.4646867096.

The spelling of 664115434 in words is "six hundred sixty-four million, one hundred fifteen thousand, four hundred thirty-four".