664423735 has 8 divisors (see below), whose sum is σ = 808230960. Its totient is φ = 524257344.

The previous prime is 664423729. The next prime is 664423759. The reversal of 664423735 is 537324466.

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

It is a cyclic number.

It is not a de Polignac number, because 664423735 - 2¹⁵ = 664390967 is a prime.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 909805 + ... + 910534.

It is an arithmetic number, because the mean of its divisors is an integer number (101028870).

Almost surely, 2^664423735 is an apocalyptic number.

664423735 is a deficient number, since it is larger than the sum of its proper divisors (143807225).

664423735 is a wasteful number, since it uses less digits than its factorization.

664423735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1820417.

The product of its digits is 362880, while the sum is 40.

The square root of 664423735 is about 25776.4181957075. The cubic root of 664423735 is about 872.5996733447.

The spelling of 664423735 in words is "six hundred sixty-four million, four hundred twenty-three thousand, seven hundred thirty-five".