166664053 has 2 divisors, whose sum is σ = 166664054. Its totient is φ = 166664052.

The previous prime is 166664033. The next prime is 166664063. The reversal of 166664053 is 350466661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 150847524 + 15816529 = 12282^2 + 3977^2 .

It is a cyclic number.

It is not a de Polignac number, because 166664053 - 2²¹ = 164566901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166664033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83332026 + 83332027.

It is an arithmetic number, because the mean of its divisors is an integer number (83332027).

Almost surely, 2^166664053 is an apocalyptic number.

It is an amenable number.

166664053 is a deficient number, since it is larger than the sum of its proper divisors (1).

166664053 is an equidigital number, since it uses as much as digits as its factorization.

166664053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 166664053 is about 12909.8432600865. The cubic root of 166664053 is about 550.3183314217.

The spelling of 166664053 in words is "one hundred sixty-six million, six hundred sixty-four thousand, fifty-three".