660868152 has 64 divisors (see below), whose sum is σ = 1896410880. Its totient is φ = 187997952.

The previous prime is 660868151. The next prime is 660868189. The reversal of 660868152 is 251868066.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660868151) 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, 30703 + ... + 47585.

It is an arithmetic number, because the mean of its divisors is an integer number (29631420).

Almost surely, 2^660868152 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 660868152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (948205440).

660868152 is an abundant number, since it is smaller than the sum of its proper divisors (1235542728).

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

660868152 is a wasteful number, since it uses less digits than its factorization.

660868152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17132 (or 17128 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 660868152 is about 25707.3559900663. The cubic root of 660868152 is about 871.0403514290.

The spelling of 660868152 in words is "six hundred sixty million, eight hundred sixty-eight thousand, one hundred fifty-two".