73205666 has 16 divisors (see below), whose sum is σ = 113097600. Its totient is φ = 35522448.

The previous prime is 73205617. The next prime is 73205669. The reversal of 73205666 is 66650237.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (73205669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5396 + ... + 13248.

It is an arithmetic number, because the mean of its divisors is an integer number (7068600).

Almost surely, 2^73205666 is an apocalyptic number.

73205666 is a deficient number, since it is larger than the sum of its proper divisors (39891934).

73205666 is a wasteful number, since it uses less digits than its factorization.

73205666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7993.

The product of its (nonzero) digits is 45360, while the sum is 35.

The square root of 73205666 is about 8556.0309723610. The cubic root of 73205666 is about 418.3260392831.

The spelling of 73205666 in words is "seventy-three million, two hundred five thousand, six hundred sixty-six".