72813566 has 8 divisors (see below), whose sum is σ = 124823280. Its totient is φ = 31205808.

The previous prime is 72813547. The next prime is 72813619. The reversal of 72813566 is 66531827.

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

It is a Curzon number.

It is a congruent number.

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, 2600471 + ... + 2600498.

It is an arithmetic number, because the mean of its divisors is an integer number (15602910).

Almost surely, 2^72813566 is an apocalyptic number.

72813566 is a deficient number, since it is larger than the sum of its proper divisors (52009714).

72813566 is a wasteful number, since it uses less digits than its factorization.

72813566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5200978.

The product of its digits is 60480, while the sum is 38.

The square root of 72813566 is about 8533.0865459106. The cubic root of 72813566 is about 417.5778305184.

The spelling of 72813566 in words is "seventy-two million, eight hundred thirteen thousand, five hundred sixty-six".