72755761 has 8 divisors (see below), whose sum is σ = 79345280. Its totient is φ = 66308112.

The previous prime is 72755747. The next prime is 72755773. The reversal of 72755761 is 16755727.

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

It is not a de Polignac number, because 72755761 - 2¹⁷ = 72624689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72755701) 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, 34395 + ... + 36448.

It is an arithmetic number, because the mean of its divisors is an integer number (9918160).

Almost surely, 2^72755761 is an apocalyptic number.

It is an amenable number.

72755761 is a deficient number, since it is larger than the sum of its proper divisors (6589519).

72755761 is a wasteful number, since it uses less digits than its factorization.

72755761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70935.

The product of its digits is 102900, while the sum is 40.

The square root of 72755761 is about 8529.6987637313. The cubic root of 72755761 is about 417.4672994814.

The spelling of 72755761 in words is "seventy-two million, seven hundred fifty-five thousand, seven hundred sixty-one".