166328805 has 16 divisors (see below), whose sum is σ = 267093504. Its totient is φ = 88386240.

The previous prime is 166328803. The next prime is 166328809. The reversal of 166328805 is 508823661.

It is a happy number.

It is not a de Polignac number, because 166328805 - 2¹ = 166328803 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166328803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15861 + ... + 24170.

It is an arithmetic number, because the mean of its divisors is an integer number (16693344).

Almost surely, 2^166328805 is an apocalyptic number.

166328805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166328805 is a deficient number, since it is larger than the sum of its proper divisors (100764699).

166328805 is a wasteful number, since it uses less digits than its factorization.

166328805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40316.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 166328805 is about 12896.8525229996. The cubic root of 166328805 is about 549.9490917068.

The spelling of 166328805 in words is "one hundred sixty-six million, three hundred twenty-eight thousand, eight hundred five".