166561833 has 8 divisors (see below), whose sum is σ = 227247328. Its totient is φ = 108458784.

The previous prime is 166561831. The next prime is 166561859. The reversal of 166561833 is 338165661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 166561833 - 2¹ = 166561831 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166561791 and 166561800.

It is not an unprimeable number, because it can be changed into a prime (166561831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 645460 + ... + 645717.

It is an arithmetic number, because the mean of its divisors is an integer number (28405916).

Almost surely, 2^166561833 is an apocalyptic number.

It is an amenable number.

166561833 is a deficient number, since it is larger than the sum of its proper divisors (60685495).

166561833 is a wasteful number, since it uses less digits than its factorization.

166561833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1291223.

The product of its digits is 77760, while the sum is 39.

The square root of 166561833 is about 12905.8836582390. The cubic root of 166561833 is about 550.2057995681.

The spelling of 166561833 in words is "one hundred sixty-six million, five hundred sixty-one thousand, eight hundred thirty-three".