72536663 has 4 divisors (see below), whose sum is σ = 72588240. Its totient is φ = 72485088.

The previous prime is 72536609. The next prime is 72536677. The reversal of 72536663 is 36663527.

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

It is a cyclic number.

It is not a de Polignac number, because 72536663 - 2⁶ = 72536599 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 (72536693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23618 + ... + 26511.

It is an arithmetic number, because the mean of its divisors is an integer number (18147060).

Almost surely, 2^72536663 is an apocalyptic number.

72536663 is a deficient number, since it is larger than the sum of its proper divisors (51577).

72536663 is a wasteful number, since it uses less digits than its factorization.

72536663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51576.

The product of its digits is 136080, while the sum is 38.

The square root of 72536663 is about 8516.8458363411. The cubic root of 72536663 is about 417.0478219610.

The spelling of 72536663 in words is "seventy-two million, five hundred thirty-six thousand, six hundred sixty-three".