664655434 has 8 divisors (see below), whose sum is σ = 999352548. Its totient is φ = 331537920.

The previous prime is 664655419. The next prime is 664655479. The reversal of 664655434 is 434556466.

It can be written as a sum of positive squares in 2 ways, for example, as 661775625 + 2879809 = 25725^2 + 1697^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 393847 + ... + 395530.

Almost surely, 2^664655434 is an apocalyptic number.

664655434 is a deficient number, since it is larger than the sum of its proper divisors (334697114).

664655434 is a wasteful number, since it uses less digits than its factorization.

664655434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789800.

The product of its digits is 1036800, while the sum is 43.

The square root of 664655434 is about 25780.9122026355. The cubic root of 664655434 is about 872.7010930482.

The spelling of 664655434 in words is "six hundred sixty-four million, six hundred fifty-five thousand, four hundred thirty-four".