72884566 has 4 divisors (see below), whose sum is σ = 109326852. Its totient is φ = 36442282.

The previous prime is 72884533. The next prime is 72884579. The reversal of 72884566 is 66548827.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×72884566² = 10624319922016712, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18221140 + ... + 18221143.

It is an arithmetic number, because the mean of its divisors is an integer number (27331713).

Almost surely, 2^72884566 is an apocalyptic number.

72884566 is a deficient number, since it is larger than the sum of its proper divisors (36442286).

72884566 is a wasteful number, since it uses less digits than its factorization.

72884566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36442285.

The product of its digits is 645120, while the sum is 46.

The square root of 72884566 is about 8537.2458088074. The cubic root of 72884566 is about 417.7135121699.

The spelling of 72884566 in words is "seventy-two million, eight hundred eighty-four thousand, five hundred sixty-six".