190666857133 has 2 divisors, whose sum is σ = 190666857134. Its totient is φ = 190666857132.

The previous prime is 190666857113. The next prime is 190666857181. The reversal of 190666857133 is 331758666091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190150067844 + 516789289 = 436062^2 + 22733^2 .

It is an emirp because it is prime and its reverse (331758666091) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 190666857133 - 2⁹ = 190666856621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (190666857103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95333428566 + 95333428567.

It is an arithmetic number, because the mean of its divisors is an integer number (95333428567).

Almost surely, 2^190666857133 is an apocalyptic number.

It is an amenable number.

190666857133 is a deficient number, since it is larger than the sum of its proper divisors (1).

190666857133 is an equidigital number, since it uses as much as digits as its factorization.

190666857133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4898880, while the sum is 55.

The spelling of 190666857133 in words is "one hundred ninety billion, six hundred sixty-six million, eight hundred fifty-seven thousand, one hundred thirty-three".