660008209516 has 12 divisors (see below), whose sum is σ = 1159806959080. Its totient is φ = 328634792640.

The previous prime is 660008209501. The next prime is 660008209541. The reversal of 660008209516 is 615902800066.

It is a super-2 number, since 2×660008209516² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 342326946 + ... + 342328873.

Almost surely, 2^660008209516 is an apocalyptic number.

It is an amenable number.

660008209516 is a deficient number, since it is larger than the sum of its proper divisors (499798749564).

660008209516 is a wasteful number, since it uses less digits than its factorization.

660008209516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684656064 (or 684656062 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 43.

The spelling of 660008209516 in words is "six hundred sixty billion, eight million, two hundred nine thousand, five hundred sixteen".