665660450852 has 48 divisors (see below), whose sum is σ = 1224110243328. Its totient is φ = 316357073280.

The previous prime is 665660450801. The next prime is 665660450881. The reversal of 665660450852 is 258054066566.

It is a junction number, because it is equal to n+sod(n) for n = 665660450794 and 665660450803.

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 15 ways as a sum of consecutive naturals, for example, 3674753 + ... + 3851639.

It is an arithmetic number, because the mean of its divisors is an integer number (25502296736).

Almost surely, 2^665660450852 is an apocalyptic number.

It is an amenable number.

665660450852 is a deficient number, since it is larger than the sum of its proper divisors (558449792476).

665660450852 is a wasteful number, since it uses less digits than its factorization.

665660450852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177516 (or 177514 counting only the distinct ones).

The product of its (nonzero) digits is 10368000, while the sum is 53.

The spelling of 665660450852 in words is "six hundred sixty-five billion, six hundred sixty million, four hundred fifty thousand, eight hundred fifty-two".