166627553 has 2 divisors, whose sum is σ = 166627554. Its totient is φ = 166627552.

The previous prime is 166627541. The next prime is 166627561. The reversal of 166627553 is 355726661.

166627553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111154849 + 55472704 = 10543^2 + 7448^2 .

It is an emirp because it is prime and its reverse (355726661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166627553 - 2⁸ = 166627297 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166627553.

It is not a weakly prime, because it can be changed into another prime (166627583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83313776 + 83313777.

It is an arithmetic number, because the mean of its divisors is an integer number (83313777).

Almost surely, 2^166627553 is an apocalyptic number.

It is an amenable number.

166627553 is a deficient number, since it is larger than the sum of its proper divisors (1).

166627553 is an equidigital number, since it uses as much as digits as its factorization.

166627553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 226800, while the sum is 41.

The square root of 166627553 is about 12908.4295326736. The cubic root of 166627553 is about 550.2781546204.

The spelling of 166627553 in words is "one hundred sixty-six million, six hundred twenty-seven thousand, five hundred fifty-three".