918664 has 8 divisors (see below), whose sum is σ = 1722510. Its totient is φ = 459328.

The previous prime is 918653. The next prime is 918677. The reversal of 918664 is 466819.

It can be written as a sum of positive squares in only one way, i.e., 917764 + 900 = 958^2 + 30^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 918664.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57409 + ... + 57424.

2⁹¹⁸⁶⁶⁴ is an apocalyptic number.

It is an amenable number.

918664 is a deficient number, since it is larger than the sum of its proper divisors (803846).

918664 is a wasteful number, since it uses less digits than its factorization.

918664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114839 (or 114835 counting only the distinct ones).

The product of its digits is 10368, while the sum is 34.

The square root of 918664 is about 958.4696134985. The cubic root of 918664 is about 97.2117808772.

The spelling of 918664 in words is "nine hundred eighteen thousand, six hundred sixty-four".