72539566 has 16 divisors (see below), whose sum is σ = 122531328. Its totient is φ = 31908600.

The previous prime is 72539543. The next prime is 72539567. The reversal of 72539566 is 66593527.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72539567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52500 + ... + 53863.

It is an arithmetic number, because the mean of its divisors is an integer number (7658208).

Almost surely, 2^72539566 is an apocalyptic number.

72539566 is a deficient number, since it is larger than the sum of its proper divisors (49991762).

72539566 is a wasteful number, since it uses less digits than its factorization.

72539566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106407.

The product of its digits is 340200, while the sum is 43.

The square root of 72539566 is about 8517.0162615789. The cubic root of 72539566 is about 417.0533854633.

The spelling of 72539566 in words is "seventy-two million, five hundred thirty-nine thousand, five hundred sixty-six".