166553227 has 2 divisors, whose sum is σ = 166553228. Its totient is φ = 166553226.

The previous prime is 166553207. The next prime is 166553239. The reversal of 166553227 is 722355661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166553227 - 2⁷ = 166553099 is a prime.

It is a super-2 number, since 2×166553227² = 55479954848227058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (166553207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83276613 + 83276614.

It is an arithmetic number, because the mean of its divisors is an integer number (83276614).

Almost surely, 2^166553227 is an apocalyptic number.

166553227 is a deficient number, since it is larger than the sum of its proper divisors (1).

166553227 is an equidigital number, since it uses as much as digits as its factorization.

166553227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75600, while the sum is 37.

The square root of 166553227 is about 12905.5502401099. The cubic root of 166553227 is about 550.1963233022.

The spelling of 166553227 in words is "one hundred sixty-six million, five hundred fifty-three thousand, two hundred twenty-seven".