166747045 has 4 divisors (see below), whose sum is σ = 200096460. Its totient is φ = 133397632.

The previous prime is 166747043. The next prime is 166747069. The reversal of 166747045 is 540747661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 540747661 = 43 ⋅12575527.

It can be written as a sum of positive squares in 2 ways, for example, as 38763076 + 127983969 = 6226^2 + 11313^2 .

It is a cyclic number.

It is not a de Polignac number, because 166747045 - 2¹ = 166747043 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 166746989 and 166747007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166747043) 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, 16674700 + ... + 16674709.

It is an arithmetic number, because the mean of its divisors is an integer number (50024115).

Almost surely, 2^166747045 is an apocalyptic number.

It is an amenable number.

166747045 is a deficient number, since it is larger than the sum of its proper divisors (33349415).

166747045 is an equidigital number, since it uses as much as digits as its factorization.

166747045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33349414.

The product of its (nonzero) digits is 141120, while the sum is 40.

The square root of 166747045 is about 12913.0571515811. The cubic root of 166747045 is about 550.4096617341.

The spelling of 166747045 in words is "one hundred sixty-six million, seven hundred forty-seven thousand, forty-five".