664937 has 8 divisors (see below), whose sum is σ = 818496. Its totient is φ = 526032.

The previous prime is 664933. The next prime is 664949. The reversal of 664937 is 739466.

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

It is not a de Polignac number, because 664937 - 2² = 664933 is a prime.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 664897 and 664906.

It is not an unprimeable number, because it can be changed into a prime (664933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3563 + ... + 3744.

It is an arithmetic number, because the mean of its divisors is an integer number (102312).

2⁶⁶⁴⁹³⁷ is an apocalyptic number.

It is an amenable number.

664937 is a deficient number, since it is larger than the sum of its proper divisors (153559).

664937 is a wasteful number, since it uses less digits than its factorization.

664937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7327.

The product of its digits is 27216, while the sum is 35.

The square root of 664937 is about 815.4366928217. The cubic root of 664937 is about 87.2824308905.

Subtracting 664937 from its reverse (739466), we obtain a square (74529 = 273²).

The spelling of 664937 in words is "six hundred sixty-four thousand, nine hundred thirty-seven".