73666538 has 8 divisors (see below), whose sum is σ = 120545280. Its totient is φ = 33484780.

The previous prime is 73666529. The next prime is 73666561. The reversal of 73666538 is 83566637.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1674218 + ... + 1674261.

It is an arithmetic number, because the mean of its divisors is an integer number (15068160).

Almost surely, 2^73666538 is an apocalyptic number.

73666538 is a deficient number, since it is larger than the sum of its proper divisors (46878742).

73666538 is a wasteful number, since it uses less digits than its factorization.

73666538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3348492.

The product of its digits is 544320, while the sum is 44.

The square root of 73666538 is about 8582.9212975536. The cubic root of 73666538 is about 419.2020715777.

Subtracting 73666538 from its reverse (83566637), we obtain a palindrome (9900099).

The spelling of 73666538 in words is "seventy-three million, six hundred sixty-six thousand, five hundred thirty-eight".