660938 has 4 divisors (see below), whose sum is σ = 991410. Its totient is φ = 330468.

The previous prime is 660923. The next prime is 660941. The reversal of 660938 is 839066.

It is a happy number.

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., 644809 + 16129 = 803^2 + 127^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 660938.

It is an unprimeable number.

660938 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165233 + ... + 165236.

2⁶⁶⁰⁹³⁸ is an apocalyptic number.

660938 is a deficient number, since it is larger than the sum of its proper divisors (330472).

660938 is a wasteful number, since it uses less digits than its factorization.

660938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330471.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 660938 is about 812.9809345858. The cubic root of 660938 is about 87.1071037471.

The spelling of 660938 in words is "six hundred sixty thousand, nine hundred thirty-eight".