660155705651 has 12 divisors (see below), whose sum is σ = 714889024200. Its totient is φ = 609335400960.

The previous prime is 660155705647. The next prime is 660155705659. The reversal of 660155705651 is 156507551066.

It is not a de Polignac number, because 660155705651 - 2² = 660155705647 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 660155705596 and 660155705605.

It is not an unprimeable number, because it can be changed into a prime (660155705659) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 2705171 + ... + 2939091.

It is an arithmetic number, because the mean of its divisors is an integer number (59574085350).

Almost surely, 2^660155705651 is an apocalyptic number.

660155705651 is a deficient number, since it is larger than the sum of its proper divisors (54733318549).

660155705651 is a wasteful number, since it uses less digits than its factorization.

660155705651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250646 (or 250633 counting only the distinct ones).

The product of its (nonzero) digits is 945000, while the sum is 47.

The spelling of 660155705651 in words is "six hundred sixty billion, one hundred fifty-five million, seven hundred five thousand, six hundred fifty-one".