72244663 has 4 divisors (see below), whose sum is σ = 74575168. Its totient is φ = 69914160.

The previous prime is 72244639. The next prime is 72244699. The reversal of 72244663 is 36644227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36644227 = 151 ⋅242677.

It is a cyclic number.

It is not a de Polignac number, because 72244663 - 2¹³ = 72236471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72244063) 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, 1165206 + ... + 1165267.

It is an arithmetic number, because the mean of its divisors is an integer number (18643792).

Almost surely, 2^72244663 is an apocalyptic number.

72244663 is a deficient number, since it is larger than the sum of its proper divisors (2330505).

72244663 is a wasteful number, since it uses less digits than its factorization.

72244663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2330504.

The product of its digits is 48384, while the sum is 34.

The square root of 72244663 is about 8499.6860530257. The cubic root of 72244663 is about 416.4874536673.

The spelling of 72244663 in words is "seventy-two million, two hundred forty-four thousand, six hundred sixty-three".