660948 has 12 divisors (see below), whose sum is σ = 1542240. Its totient is φ = 220312.

The previous prime is 660941. The next prime is 660949. The reversal of 660948 is 849066.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660941) by changing a digit.

660948 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 in 3 ways as a sum of consecutive naturals, for example, 27528 + ... + 27551.

It is an arithmetic number, because the mean of its divisors is an integer number (128520).

2⁶⁶⁰⁹⁴⁸ is an apocalyptic number.

It is an amenable number.

660948 is an abundant number, since it is smaller than the sum of its proper divisors (881292).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

660948 is a wasteful number, since it uses less digits than its factorization.

660948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55086 (or 55084 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 660948 is about 812.9870847683. The cubic root of 660948 is about 87.1075430554.

The spelling of 660948 in words is "six hundred sixty thousand, nine hundred forty-eight".