660111254433247 has 16 divisors (see below), whose sum is σ = 700972420629600. Its totient is φ = 619477327687680.

The previous prime is 660111254433203. The next prime is 660111254433283. The reversal of 660111254433247 is 742334452111066.

It is a cyclic number.

It is not a de Polignac number, because 660111254433247 - 2⁷ = 660111254433119 is a prime.

It is a super-2 number, since 2×660111254433247² (a number of 30 digits) contains 22 as substring.

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 660111254433247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660111254431247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10893597 + ... + 37932742.

It is an arithmetic number, because the mean of its divisors is an integer number (43810776289350).

Almost surely, 2^{660111254433247} is an apocalyptic number.

660111254433247 is a deficient number, since it is larger than the sum of its proper divisors (40861166196353).

660111254433247 is a wasteful number, since it uses less digits than its factorization.

660111254433247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48828666.

The product of its (nonzero) digits is 2903040, while the sum is 49.

The spelling of 660111254433247 in words is "six hundred sixty trillion, one hundred eleven billion, two hundred fifty-four million, four hundred thirty-three thousand, two hundred forty-seven".