166188946753 has 2 divisors, whose sum is σ = 166188946754. Its totient is φ = 166188946752.

The previous prime is 166188946751. The next prime is 166188946769. The reversal of 166188946753 is 357649881661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163391383089 + 2797563664 = 404217^2 + 52892^2 .

It is a cyclic number.

It is not a de Polignac number, because 166188946753 - 2¹ = 166188946751 is a prime.

Together with 166188946751, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (166188946751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83094473376 + 83094473377.

It is an arithmetic number, because the mean of its divisors is an integer number (83094473377).

Almost surely, 2^166188946753 is an apocalyptic number.

It is an amenable number.

166188946753 is a deficient number, since it is larger than the sum of its proper divisors (1).

166188946753 is an equidigital number, since it uses as much as digits as its factorization.

166188946753 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52254720, while the sum is 64.

The spelling of 166188946753 in words is "one hundred sixty-six billion, one hundred eighty-eight million, nine hundred forty-six thousand, seven hundred fifty-three".