664234534 has 4 divisors (see below), whose sum is σ = 996351804. Its totient is φ = 332117266.

The previous prime is 664234513. The next prime is 664234579. The reversal of 664234534 is 435432466.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 664234493 and 664234502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166058632 + ... + 166058635.

It is an arithmetic number, because the mean of its divisors is an integer number (249087951).

Almost surely, 2^664234534 is an apocalyptic number.

664234534 is a deficient number, since it is larger than the sum of its proper divisors (332117270).

664234534 is a wasteful number, since it uses less digits than its factorization.

664234534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332117269.

The product of its digits is 207360, while the sum is 37.

The square root of 664234534 is about 25772.7478938510. The cubic root of 664234534 is about 872.5168384530.

The spelling of 664234534 in words is "six hundred sixty-four million, two hundred thirty-four thousand, five hundred thirty-four".