166745073 has 32 divisors (see below), whose sum is σ = 249951744. Its totient is φ = 98000000.

The previous prime is 166745057. The next prime is 166745081. The reversal of 166745073 is 370547661.

It is a cyclic number.

It is not a de Polignac number, because 166745073 - 2⁴ = 166745057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166745093) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 339358 + ... + 339848.

It is an arithmetic number, because the mean of its divisors is an integer number (7810992).

Almost surely, 2^166745073 is an apocalyptic number.

It is an amenable number.

166745073 is a deficient number, since it is larger than the sum of its proper divisors (83206671).

166745073 is a wasteful number, since it uses less digits than its factorization.

166745073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797.

The product of its (nonzero) digits is 105840, while the sum is 39.

The square root of 166745073 is about 12912.9807945338. The cubic root of 166745073 is about 550.4074919563.

The spelling of 166745073 in words is "one hundred sixty-six million, seven hundred forty-five thousand, seventy-three".