166355477 has 2 divisors, whose sum is σ = 166355478. Its totient is φ = 166355476.

The previous prime is 166355467. The next prime is 166355503. The reversal of 166355477 is 774553661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128913316 + 37442161 = 11354^2 + 6119^2 .

It is a cyclic number.

It is not a de Polignac number, because 166355477 - 2⁸ = 166355221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166355407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83177738 + 83177739.

It is an arithmetic number, because the mean of its divisors is an integer number (83177739).

Almost surely, 2^166355477 is an apocalyptic number.

It is an amenable number.

166355477 is a deficient number, since it is larger than the sum of its proper divisors (1).

166355477 is an equidigital number, since it uses as much as digits as its factorization.

166355477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 529200, while the sum is 44.

The square root of 166355477 is about 12897.8865322967. The cubic root of 166355477 is about 549.9784862108.

The spelling of 166355477 in words is "one hundred sixty-six million, three hundred fifty-five thousand, four hundred seventy-seven".