73406666 has 8 divisors (see below), whose sum is σ = 111347460. Its totient is φ = 36290848.

The previous prime is 73406657. The next prime is 73406681. The reversal of 73406666 is 66660437.

It can be written as a sum of positive squares in 2 ways, for example, as 65141041 + 8265625 = 8071^2 + 2875^2 .

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

It is a super-2 number, since 2×73406666² = 10777077226471112, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206021 + ... + 206376.

Almost surely, 2^73406666 is an apocalyptic number.

73406666 is a deficient number, since it is larger than the sum of its proper divisors (37940794).

73406666 is a wasteful number, since it uses less digits than its factorization.

73406666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412488.

The product of its (nonzero) digits is 108864, while the sum is 38.

The square root of 73406666 is about 8567.7690211630. The cubic root of 73406666 is about 418.7085538247.

The spelling of 73406666 in words is "seventy-three million, four hundred six thousand, six hundred sixty-six".