166552277 has 2 divisors, whose sum is σ = 166552278. Its totient is φ = 166552276.

The previous prime is 166552193. The next prime is 166552283. The reversal of 166552277 is 772255661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145106116 + 21446161 = 12046^2 + 4631^2 .

It is a cyclic number.

It is not a de Polignac number, because 166552277 - 2¹⁸ = 166290133 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166557277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83276138 + 83276139.

It is an arithmetic number, because the mean of its divisors is an integer number (83276139).

Almost surely, 2^166552277 is an apocalyptic number.

It is an amenable number.

166552277 is a deficient number, since it is larger than the sum of its proper divisors (1).

166552277 is an equidigital number, since it uses as much as digits as its factorization.

166552277 is an evil number, because the sum of its binary digits is even.

The product of its digits is 176400, while the sum is 41.

The square root of 166552277 is about 12905.5134341877. The cubic root of 166552277 is about 550.1952772152.

The spelling of 166552277 in words is "one hundred sixty-six million, five hundred fifty-two thousand, two hundred seventy-seven".