660753357066 has 96 divisors (see below), whose sum is σ = 1614600805440. Its totient is φ = 200148965280.

The previous prime is 660753357059. The next prime is 660753357071.

It is a happy number.

660753357066 is a `hidden beast` number, since 6 + 6 + 0 + 7 + 5 + 3 + 3 + 570 + 66 = 666.

660753357066 is nontrivially palindromic in base 10.

660753357066 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17668860 + ... + 17706216.

It is an arithmetic number, because the mean of its divisors is an integer number (16818758390).

Almost surely, 2^660753357066 is an apocalyptic number.

660753357066 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 660753357066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (807300402720).

660753357066 is an abundant number, since it is smaller than the sum of its proper divisors (953847448374).

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

660753357066 is a wasteful number, since it uses less digits than its factorization.

660753357066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40097 (or 40080 counting only the distinct ones).

The product of its (nonzero) digits is 14288400, while the sum is 54.

The spelling of 660753357066 in words is "six hundred sixty billion, seven hundred fifty-three million, three hundred fifty-seven thousand, sixty-six".