166395128 has 8 divisors (see below), whose sum is σ = 311990880. Its totient is φ = 83197560.

The previous prime is 166395121. The next prime is 166395137. The reversal of 166395128 is 821593661.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166395121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10399688 + ... + 10399703.

It is an arithmetic number, because the mean of its divisors is an integer number (38998860).

Almost surely, 2^166395128 is an apocalyptic number.

It is an amenable number.

166395128 is a deficient number, since it is larger than the sum of its proper divisors (145595752).

166395128 is a wasteful number, since it uses less digits than its factorization.

166395128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20799397 (or 20799393 counting only the distinct ones).

The product of its digits is 77760, while the sum is 41.

The square root of 166395128 is about 12899.4235530120. The cubic root of 166395128 is about 550.0221787200.

The spelling of 166395128 in words is "one hundred sixty-six million, three hundred ninety-five thousand, one hundred twenty-eight".