166425233 has 16 divisors (see below), whose sum is σ = 181972560. Its totient is φ = 151289856.

The previous prime is 166425227. The next prime is 166425239. The reversal of 166425233 is 332524661.

It is an interprime number because it is at equal distance from previous prime (166425227) and next prime (166425239).

It can be written as a sum of positive squares in 8 ways, for example, as 30283009 + 136142224 = 5503^2 + 11668^2 .

It is a cyclic number.

It is not a de Polignac number, because 166425233 - 2⁸ = 166424977 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166425233.

It is not an unprimeable number, because it can be changed into a prime (166425239) 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, 363941 + ... + 364397.

It is an arithmetic number, because the mean of its divisors is an integer number (11373285).

Almost surely, 2^166425233 is an apocalyptic number.

166425233 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

166425233 is a deficient number, since it is larger than the sum of its proper divisors (15547327).

166425233 is a wasteful number, since it uses less digits than its factorization.

166425233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836.

The product of its digits is 25920, while the sum is 32.

The square root of 166425233 is about 12900.5904128455. The cubic root of 166425233 is about 550.0553475981.

Adding to 166425233 its reverse (332524661), we get a palindrome (498949894).

The spelling of 166425233 in words is "one hundred sixty-six million, four hundred twenty-five thousand, two hundred thirty-three".