660635232 has 96 divisors (see below), whose sum is σ = 1842849792. Its totient is φ = 206505984.

The previous prime is 660635231. The next prime is 660635237. The reversal of 660635232 is 232536066.

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 660635193 and 660635202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660635231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 598393 + ... + 599495.

It is an arithmetic number, because the mean of its divisors is an integer number (19196352).

Almost surely, 2^660635232 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 660635232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (921424896).

660635232 is an abundant number, since it is smaller than the sum of its proper divisors (1182214560).

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

660635232 is a wasteful number, since it uses less digits than its factorization.

660635232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1500 (or 1492 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 33.

The square root of 660635232 is about 25702.8253699861. The cubic root of 660635232 is about 870.9380079899.

The spelling of 660635232 in words is "six hundred sixty million, six hundred thirty-five thousand, two hundred thirty-two".