660065628816 has 60 divisors (see below), whose sum is σ = 2015200371600. Its totient is φ = 200019887040.

The previous prime is 660065628799. The next prime is 660065628821. The reversal of 660065628816 is 618826560066.

It is a happy number.

660065628816 is a `hidden beast` number, since 6 + 6 + 0 + 0 + 6 + 5 + 628 + 8 + 1 + 6 = 666.

660065628816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×660065628816² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 208352466 + ... + 208355633.

It is an arithmetic number, because the mean of its divisors is an integer number (33586672860).

Almost surely, 2^660065628816 is an apocalyptic number.

660065628816 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

660065628816 is an abundant number, since it is smaller than the sum of its proper divisors (1355134742784).

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

660065628816 is a wasteful number, since it uses less digits than its factorization.

660065628816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416708124 (or 416708115 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 54.

The spelling of 660065628816 in words is "six hundred sixty billion, sixty-five million, six hundred twenty-eight thousand, eight hundred sixteen".