1966066759193 has 4 divisors (see below), whose sum is σ = 1977431307108. Its totient is φ = 1954702211280.

The previous prime is 1966066759187. The next prime is 1966066759199. The reversal of 1966066759193 is 3919576606691.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1966066759187) and next prime (1966066759199).

It can be written as a sum of positive squares in 2 ways, for example, as 1589306498329 + 376760260864 = 1260677^2 + 613808^2 .

It is a cyclic number.

It is not a de Polignac number, because 1966066759193 - 2⁴ = 1966066759177 is a prime.

It is a super-2 number, since 2×1966066759193² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1966066759199) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5682273698 + ... + 5682274043.

It is an arithmetic number, because the mean of its divisors is an integer number (494357826777).

Almost surely, 2^{1966066759193} is an apocalyptic number.

It is an amenable number.

1966066759193 is a deficient number, since it is larger than the sum of its proper divisors (11364547915).

1966066759193 is a wasteful number, since it uses less digits than its factorization.

1966066759193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11364547914.

The product of its (nonzero) digits is 99202320, while the sum is 68.

The spelling of 1966066759193 in words is "one trillion, nine hundred sixty-six billion, sixty-six million, seven hundred fifty-nine thousand, one hundred ninety-three".