660718410 has 64 divisors (see below), whose sum is σ = 1747799424. Its totient is φ = 158515200.

The previous prime is 660718393. The next prime is 660718417. The reversal of 660718410 is 14817066.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (660718417) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21690 + ... + 42330.

It is an arithmetic number, because the mean of its divisors is an integer number (27309366).

Almost surely, 2^660718410 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 660718410, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (873899712).

660718410 is an abundant number, since it is smaller than the sum of its proper divisors (1087081014).

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

660718410 is a wasteful number, since it uses less digits than its factorization.

660718410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20759.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 660718410 is about 25704.4433902001. The cubic root of 660718410 is about 870.9745585895.

The spelling of 660718410 in words is "six hundred sixty million, seven hundred eighteen thousand, four hundred ten".