664118 has 32 divisors (see below), whose sum is σ = 1270080. Its totient is φ = 253440.

The previous prime is 664117. The next prime is 664121. The reversal of 664118 is 811466.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7418 + ... + 7506.

It is an arithmetic number, because the mean of its divisors is an integer number (39690).

2⁶⁶⁴¹¹⁸ is an apocalyptic number.

664118 is a deficient number, since it is larger than the sum of its proper divisors (605962).

664118 is a wasteful number, since it uses less digits than its factorization.

664118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152.

The product of its digits is 1152, while the sum is 26.

The square root of 664118 is about 814.9343531844. The cubic root of 664118 is about 87.2465810380.

The spelling of 664118 in words is "six hundred sixty-four thousand, one hundred eighteen".