664354 has 8 divisors (see below), whose sum is σ = 1049040. Its totient is φ = 314676.

The previous prime is 664331. The next prime is 664357. The reversal of 664354 is 453466.

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

It is not an unprimeable number, because it can be changed into a prime (664357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8704 + ... + 8779.

It is an arithmetic number, because the mean of its divisors is an integer number (131130).

2⁶⁶⁴³⁵⁴ is an apocalyptic number.

664354 is a deficient number, since it is larger than the sum of its proper divisors (384686).

664354 is a wasteful number, since it uses less digits than its factorization.

664354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17504.

The product of its digits is 8640, while the sum is 28.

The square root of 664354 is about 815.0791372621. The cubic root of 664354 is about 87.2569144199.

The spelling of 664354 in words is "six hundred sixty-four thousand, three hundred fifty-four".