72249665 has 8 divisors (see below), whose sum is σ = 87383040. Its totient is φ = 57344112.

The previous prime is 72249637. The next prime is 72249691. The reversal of 72249665 is 56694227.

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

It is a cyclic number.

It is not a de Polignac number, because 72249665 - 2¹⁰ = 72248641 is a prime.

It is a super-2 number, since 2×72249665² = 10440028185224450, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56255 + ... + 57524.

It is an arithmetic number, because the mean of its divisors is an integer number (10922880).

Almost surely, 2^72249665 is an apocalyptic number.

It is an amenable number.

72249665 is a deficient number, since it is larger than the sum of its proper divisors (15133375).

72249665 is a wasteful number, since it uses less digits than its factorization.

72249665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113911.

The product of its digits is 181440, while the sum is 41.

The square root of 72249665 is about 8499.9802940948. The cubic root of 72249665 is about 416.4970655523.

The spelling of 72249665 in words is "seventy-two million, two hundred forty-nine thousand, six hundred sixty-five".