72776725 has 24 divisors (see below), whose sum is σ = 103707648. Its totient is φ = 49627200.

The previous prime is 72776701. The next prime is 72776731. The reversal of 72776725 is 52767727.

It is not a de Polignac number, because 72776725 - 2¹³ = 72768533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 33420 + ... + 35530.

It is an arithmetic number, because the mean of its divisors is an integer number (4321152).

Almost surely, 2^72776725 is an apocalyptic number.

It is an amenable number.

72776725 is a deficient number, since it is larger than the sum of its proper divisors (30930923).

72776725 is a wasteful number, since it uses less digits than its factorization.

72776725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2325 (or 2320 counting only the distinct ones).

The product of its digits is 288120, while the sum is 43.

The square root of 72776725 is about 8530.9275580092. The cubic root of 72776725 is about 417.5073922699.

The spelling of 72776725 in words is "seventy-two million, seven hundred seventy-six thousand, seven hundred twenty-five".