72265663 has 4 divisors (see below), whose sum is σ = 73450408. Its totient is φ = 71080920.

The previous prime is 72265643. The next prime is 72265703. The reversal of 72265663 is 36656227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36656227 = 23 ⋅1593749.

It is a cyclic number.

It is not a de Polignac number, because 72265663 - 2¹⁷ = 72134591 is a prime.

It is a super-3 number, since 3×72265663³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72265643) 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, 592281 + ... + 592402.

It is an arithmetic number, because the mean of its divisors is an integer number (18362602).

Almost surely, 2^72265663 is an apocalyptic number.

72265663 is a deficient number, since it is larger than the sum of its proper divisors (1184745).

72265663 is a wasteful number, since it uses less digits than its factorization.

72265663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1184744.

The product of its digits is 90720, while the sum is 37.

The square root of 72265663 is about 8500.9213030118. The cubic root of 72265663 is about 416.5278044644.

The spelling of 72265663 in words is "seventy-two million, two hundred sixty-five thousand, six hundred sixty-three".