166352563 has 4 divisors (see below), whose sum is σ = 179148928. Its totient is φ = 153556200.

The previous prime is 166352561. The next prime is 166352573. The reversal of 166352563 is 365253661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 365253661 = 1409 ⋅259229.

It is a cyclic number.

It is not a de Polignac number, because 166352563 - 2¹ = 166352561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166352561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6398163 + ... + 6398188.

It is an arithmetic number, because the mean of its divisors is an integer number (44787232).

Almost surely, 2^166352563 is an apocalyptic number.

166352563 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

166352563 is a deficient number, since it is larger than the sum of its proper divisors (12796365).

166352563 is a wasteful number, since it uses less digits than its factorization.

166352563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12796364.

The product of its digits is 97200, while the sum is 37.

The square root of 166352563 is about 12897.7735675581. The cubic root of 166352563 is about 549.9752749216.

The spelling of 166352563 in words is "one hundred sixty-six million, three hundred fifty-two thousand, five hundred sixty-three".