72655885 has 4 divisors (see below), whose sum is σ = 87187068. Its totient is φ = 58124704.

The previous prime is 72655883. The next prime is 72655903. The reversal of 72655885 is 58855627.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58855627 = 59 ⋅997553.

It can be written as a sum of positive squares in 2 ways, for example, as 50509449 + 22146436 = 7107^2 + 4706^2 .

It is a cyclic number.

It is not a de Polignac number, because 72655885 - 2¹ = 72655883 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 (72655883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7265584 + ... + 7265593.

It is an arithmetic number, because the mean of its divisors is an integer number (21796767).

Almost surely, 2^72655885 is an apocalyptic number.

It is an amenable number.

72655885 is a deficient number, since it is larger than the sum of its proper divisors (14531183).

72655885 is a wasteful number, since it uses less digits than its factorization.

72655885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14531182.

The product of its digits is 672000, while the sum is 46.

The square root of 72655885 is about 8523.8421501105. The cubic root of 72655885 is about 417.2761849130.

The spelling of 72655885 in words is "seventy-two million, six hundred fifty-five thousand, eight hundred eighty-five".