166432745 has 4 divisors (see below), whose sum is σ = 199719300. Its totient is φ = 133146192.

The previous prime is 166432741. The next prime is 166432789. The reversal of 166432745 is 547234661.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 547234661 = 31 ⋅17652731.

It can be written as a sum of positive squares in 2 ways, for example, as 38539264 + 127893481 = 6208^2 + 11309^2 .

It is a cyclic number.

It is not a de Polignac number, because 166432745 - 2² = 166432741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166432699 and 166432708.

It is not an unprimeable number, because it can be changed into a prime (166432741) 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, 16643270 + ... + 16643279.

It is an arithmetic number, because the mean of its divisors is an integer number (49929825).

Almost surely, 2^166432745 is an apocalyptic number.

It is an amenable number.

166432745 is a deficient number, since it is larger than the sum of its proper divisors (33286555).

166432745 is an equidigital number, since it uses as much as digits as its factorization.

166432745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33286554.

The product of its digits is 120960, while the sum is 38.

The square root of 166432745 is about 12900.8815590253. The cubic root of 166432745 is about 550.0636234938.

The spelling of 166432745 in words is "one hundred sixty-six million, four hundred thirty-two thousand, seven hundred forty-five".