166722053 has 2 divisors, whose sum is σ = 166722054. Its totient is φ = 166722052.

The previous prime is 166722007. The next prime is 166722067. The reversal of 166722053 is 350227661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123254404 + 43467649 = 11102^2 + 6593^2 .

It is a cyclic number.

It is not a de Polignac number, because 166722053 - 2²⁰ = 165673477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166742053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83361026 + 83361027.

It is an arithmetic number, because the mean of its divisors is an integer number (83361027).

Almost surely, 2^166722053 is an apocalyptic number.

It is an amenable number.

166722053 is a deficient number, since it is larger than the sum of its proper divisors (1).

166722053 is an equidigital number, since it uses as much as digits as its factorization.

166722053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 166722053 is about 12912.0894126396. The cubic root of 166722053 is about 550.3821619453.

The spelling of 166722053 in words is "one hundred sixty-six million, seven hundred twenty-two thousand, fifty-three".