665703442071 has 48 divisors (see below), whose sum is σ = 997173365760. Its totient is φ = 427657164480.

The previous prime is 665703442057. The next prime is 665703442087. The reversal of 665703442071 is 170244307566.

665703442071 is a `hidden beast` number, since 6 + 6 + 570 + 3 + 4 + 4 + 2 + 0 + 71 = 666.

It is not a de Polignac number, because 665703442071 - 2¹⁸ = 665703179927 is a prime.

It is a super-2 number, since 2×665703442071² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665703442021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 42213430 + ... + 42229196.

It is an arithmetic number, because the mean of its divisors is an integer number (20774445120).

Almost surely, 2^665703442071 is an apocalyptic number.

665703442071 is a deficient number, since it is larger than the sum of its proper divisors (331469923689).

665703442071 is a wasteful number, since it uses less digits than its factorization.

665703442071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17276 (or 17273 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 45.

The spelling of 665703442071 in words is "six hundred sixty-five billion, seven hundred three million, four hundred forty-two thousand, seventy-one".