166563495 has 36 divisors (see below), whose sum is σ = 335850840. Its totient is φ = 76142304.

The previous prime is 166563479. The next prime is 166563497. The reversal of 166563495 is 594365661.

166563495 is a `hidden beast` number, since 1 + 6 + 6 + 5 + 634 + 9 + 5 = 666.

It is not a de Polignac number, because 166563495 - 2⁴ = 166563479 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 166563495.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166563497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 35565 + ... + 39974.

It is an arithmetic number, because the mean of its divisors is an integer number (9329190).

Almost surely, 2^166563495 is an apocalyptic number.

166563495 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

166563495 is an abundant number, since it is smaller than the sum of its proper divisors (169287345).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166563495 is a wasteful number, since it uses less digits than its factorization.

166563495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75564 (or 75554 counting only the distinct ones).

The product of its digits is 583200, while the sum is 45.

The square root of 166563495 is about 12905.9480473152. The cubic root of 166563495 is about 550.2076295972.

The spelling of 166563495 in words is "one hundred sixty-six million, five hundred sixty-three thousand, four hundred ninety-five".