660352 has 64 divisors (see below), whose sum is σ = 1664640. Its totient is φ = 253440.

The previous prime is 660349. The next prime is 660367. The reversal of 660352 is 253066.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9823 + ... + 9889.

It is an arithmetic number, because the mean of its divisors is an integer number (26010).

2⁶⁶⁰³⁵² is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 660352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (832320).

660352 is an abundant number, since it is smaller than the sum of its proper divisors (1004288).

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

660352 is a wasteful number, since it uses less digits than its factorization.

660352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99 (or 87 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 660352 is about 812.6204526100. The cubic root of 660352 is about 87.0813525390.

The spelling of 660352 in words is "six hundred sixty thousand, three hundred fifty-two".