166031477 has 2 divisors, whose sum is σ = 166031478. Its totient is φ = 166031476.

The previous prime is 166031473. The next prime is 166031483. The reversal of 166031477 is 774130661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126202756 + 39828721 = 11234^2 + 6311^2 .

It is a cyclic number.

It is not a de Polignac number, because 166031477 - 2² = 166031473 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 (166031473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83015738 + 83015739.

It is an arithmetic number, because the mean of its divisors is an integer number (83015739).

Almost surely, 2^166031477 is an apocalyptic number.

It is an amenable number.

166031477 is a deficient number, since it is larger than the sum of its proper divisors (1).

166031477 is an equidigital number, since it uses as much as digits as its factorization.

166031477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 166031477 is about 12885.3202133280. The cubic root of 166031477 is about 549.6212014309.

The spelling of 166031477 in words is "one hundred sixty-six million, thirty-one thousand, four hundred seventy-seven".