660663051620263 has 8 divisors (see below), whose sum is σ = 680440959388368. Its totient is φ = 640986309621504.

The previous prime is 660663051620261. The next prime is 660663051620269. The reversal of 660663051620263 is 362026150366066.

660663051620263 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 660663051620263 - 2¹ = 660663051620261 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 660663051620263.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660663051620261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25291429081 + ... + 25291455202.

It is an arithmetic number, because the mean of its divisors is an integer number (85055119923546).

Almost surely, 2^{660663051620263} is an apocalyptic number.

660663051620263 is a deficient number, since it is larger than the sum of its proper divisors (19777907768105).

660663051620263 is a wasteful number, since it uses less digits than its factorization.

660663051620263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50582884673.

The product of its (nonzero) digits is 8398080, while the sum is 52.

The spelling of 660663051620263 in words is "six hundred sixty trillion, six hundred sixty-three billion, fifty-one million, six hundred twenty thousand, two hundred sixty-three".