73066681 has 4 divisors (see below), whose sum is σ = 73119312. Its totient is φ = 73014052.

The previous prime is 73066673. The next prime is 73066687. The reversal of 73066681 is 18666037.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 73066681 - 2³ = 73066673 is a prime.

It is a super-2 number, since 2×73066681² = 10677479744711522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 73066681.

It is not an unprimeable number, because it can be changed into a prime (73066687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24175 + ... + 27028.

It is an arithmetic number, because the mean of its divisors is an integer number (18279828).

Almost surely, 2^73066681 is an apocalyptic number.

It is an amenable number.

73066681 is a deficient number, since it is larger than the sum of its proper divisors (52631).

73066681 is a wasteful number, since it uses less digits than its factorization.

73066681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52630.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 73066681 is about 8547.9050649852. The cubic root of 73066681 is about 418.0611332029.

The spelling of 73066681 in words is "seventy-three million, sixty-six thousand, six hundred eighty-one".