66017711943 has 12 divisors (see below), whose sum is σ = 97387831008. Its totient is φ = 43075386240.

The previous prime is 66017711927. The next prime is 66017712067. The reversal of 66017711943 is 34911771066.

It is not a de Polignac number, because 66017711943 - 2⁴ = 66017711927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66017711443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78034698 + ... + 78035543.

It is an arithmetic number, because the mean of its divisors is an integer number (8115652584).

Almost surely, 2^66017711943 is an apocalyptic number.

66017711943 is a deficient number, since it is larger than the sum of its proper divisors (31370119065).

66017711943 is a wasteful number, since it uses less digits than its factorization.

66017711943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156070294 (or 156070291 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The spelling of 66017711943 in words is "sixty-six billion, seventeen million, seven hundred eleven thousand, nine hundred forty-three".