660942 has 24 divisors (see below), whose sum is σ = 1454544. Its totient is φ = 216864.

The previous prime is 660941. The next prime is 660949. The reversal of 660942 is 249066.

660942 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1063 + ... + 1565.

It is an arithmetic number, because the mean of its divisors is an integer number (60606).

2⁶⁶⁰⁹⁴² is an apocalyptic number.

660942 is an abundant number, since it is smaller than the sum of its proper divisors (793602).

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

660942 is a wasteful number, since it uses less digits than its factorization.

660942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584 (or 581 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 660942 is about 812.9833946644. The cubic root of 660942 is about 87.1072794709.

Adding to 660942 its sum of digits (27), we get a square (660969 = 813²).

The spelling of 660942 in words is "six hundred sixty thousand, nine hundred forty-two".