166140973 has 2 divisors, whose sum is σ = 166140974. Its totient is φ = 166140972.

The previous prime is 166140967. The next prime is 166141007. The reversal of 166140973 is 379041661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163763209 + 2377764 = 12797^2 + 1542^2 .

It is a cyclic number.

It is not a de Polignac number, because 166140973 - 2⁵ = 166140941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166140173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83070486 + 83070487.

It is an arithmetic number, because the mean of its divisors is an integer number (83070487).

Almost surely, 2^166140973 is an apocalyptic number.

It is an amenable number.

166140973 is a deficient number, since it is larger than the sum of its proper divisors (1).

166140973 is an equidigital number, since it uses as much as digits as its factorization.

166140973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 166140973 is about 12889.5683791196. The cubic root of 166140973 is about 549.7419979999.

The spelling of 166140973 in words is "one hundred sixty-six million, one hundred forty thousand, nine hundred seventy-three".