665047047843 has 12 divisors (see below), whose sum is σ = 1017130779288. Its totient is φ = 417284422080.

The previous prime is 665047047839. The next prime is 665047047893. The reversal of 665047047843 is 348740740566.

665047047843 is a `hidden beast` number, since 6 + 6 + 50 + 470 + 47 + 84 + 3 = 666.

It is not a de Polignac number, because 665047047843 - 2² = 665047047839 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 665047047843.

It is not an unprimeable number, because it can be changed into a prime (665047047803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2173356213 + ... + 2173356518.

It is an arithmetic number, because the mean of its divisors is an integer number (84760898274).

Almost surely, 2^665047047843 is an apocalyptic number.

665047047843 is a deficient number, since it is larger than the sum of its proper divisors (352083731445).

665047047843 is a wasteful number, since it uses less digits than its factorization.

665047047843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4346712754 (or 4346712751 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 54.

The spelling of 665047047843 in words is "six hundred sixty-five billion, forty-seven million, forty-seven thousand, eight hundred forty-three".