166526873 has 2 divisors, whose sum is σ = 166526874. Its totient is φ = 166526872.

The previous prime is 166526869. The next prime is 166526909. The reversal of 166526873 is 378625661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129231424 + 37295449 = 11368^2 + 6107^2 .

It is a cyclic number.

It is not a de Polignac number, because 166526873 - 2² = 166526869 is a prime.

It is not a weakly prime, because it can be changed into another prime (166526803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83263436 + 83263437.

It is an arithmetic number, because the mean of its divisors is an integer number (83263437).

Almost surely, 2^166526873 is an apocalyptic number.

It is an amenable number.

166526873 is a deficient number, since it is larger than the sum of its proper divisors (1).

166526873 is an equidigital number, since it uses as much as digits as its factorization.

166526873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 44.

The square root of 166526873 is about 12904.5291661494. The cubic root of 166526873 is about 550.1673022719.

The spelling of 166526873 in words is "one hundred sixty-six million, five hundred twenty-six thousand, eight hundred seventy-three".