664249358 has 8 divisors (see below), whose sum is σ = 996581352. Its totient is φ = 332055576.

The previous prime is 664249349. The next prime is 664249363. The reversal of 664249358 is 853942466.

664249358 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21560 + ... + 42347.

It is an arithmetic number, because the mean of its divisors is an integer number (124572669).

Almost surely, 2^664249358 is an apocalyptic number.

664249358 is a deficient number, since it is larger than the sum of its proper divisors (332331994).

664249358 is a wasteful number, since it uses less digits than its factorization.

664249358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69106.

The product of its digits is 1244160, while the sum is 47.

The square root of 664249358 is about 25773.0354828452. The cubic root of 664249358 is about 872.5233291792.

It can be divided in two parts, 66 and 4249358, that added together give a palindrome (4249424).

The spelling of 664249358 in words is "six hundred sixty-four million, two hundred forty-nine thousand, three hundred fifty-eight".