664954 has 4 divisors (see below), whose sum is σ = 997434. Its totient is φ = 332476.

The previous prime is 664949. The next prime is 664967. The reversal of 664954 is 459466.

664954 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 664225 + 729 = 815^2 + 27^2 .

It is a plaindrome in base 14.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166237 + ... + 166240.

2⁶⁶⁴⁹⁵⁴ is an apocalyptic number.

664954 is a deficient number, since it is larger than the sum of its proper divisors (332480).

664954 is a wasteful number, since it uses less digits than its factorization.

664954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332479.

The product of its digits is 25920, while the sum is 34.

The square root of 664954 is about 815.4471166176. The cubic root of 664954 is about 87.2831747147.

The spelling of 664954 in words is "six hundred sixty-four thousand, nine hundred fifty-four".