166081933 has 2 divisors, whose sum is σ = 166081934. Its totient is φ = 166081932.

The previous prime is 166081901. The next prime is 166081997. The reversal of 166081933 is 339180661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 149744169 + 16337764 = 12237^2 + 4042^2 .

It is a cyclic number.

It is not a de Polignac number, because 166081933 - 2⁵ = 166081901 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166081892 and 166081901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166081133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83040966 + 83040967.

It is an arithmetic number, because the mean of its divisors is an integer number (83040967).

Almost surely, 2^166081933 is an apocalyptic number.

It is an amenable number.

166081933 is a deficient number, since it is larger than the sum of its proper divisors (1).

166081933 is an equidigital number, since it uses as much as digits as its factorization.

166081933 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 166081933 is about 12887.2779515303. The cubic root of 166081933 is about 549.6768713540.

The spelling of 166081933 in words is "one hundred sixty-six million, eighty-one thousand, nine hundred thirty-three".