166444545 has 8 divisors (see below), whose sum is σ = 266311296. Its totient is φ = 88770416.

The previous prime is 166444517. The next prime is 166444559. The reversal of 166444545 is 545444661.

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

It is a cyclic number.

It is not a de Polignac number, because 166444545 - 2⁵ = 166444513 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5548137 + ... + 5548166.

It is an arithmetic number, because the mean of its divisors is an integer number (33288912).

Almost surely, 2^166444545 is an apocalyptic number.

166444545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166444545 is a deficient number, since it is larger than the sum of its proper divisors (99866751).

166444545 is a wasteful number, since it uses less digits than its factorization.

166444545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11096311.

The product of its digits is 230400, while the sum is 39.

The square root of 166444545 is about 12901.3388840073. The cubic root of 166444545 is about 550.0766229336.

The spelling of 166444545 in words is "one hundred sixty-six million, four hundred forty-four thousand, five hundred forty-five".