72756266 has 16 divisors (see below), whose sum is σ = 119495520. Its totient is φ = 32948880.

The previous prime is 72756197. The next prime is 72756269. The reversal of 72756266 is 66265727.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72756269) by changing a digit.

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, 125 + ... + 12063.

It is an arithmetic number, because the mean of its divisors is an integer number (7468470).

Almost surely, 2^72756266 is an apocalyptic number.

72756266 is a deficient number, since it is larger than the sum of its proper divisors (46739254).

72756266 is a wasteful number, since it uses less digits than its factorization.

72756266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12229.

The product of its digits is 211680, while the sum is 41.

The square root of 72756266 is about 8529.7283661322. The cubic root of 72756266 is about 417.4682653637.

The spelling of 72756266 in words is "seventy-two million, seven hundred fifty-six thousand, two hundred sixty-six".