72660226005 has 24 divisors (see below), whose sum is σ = 125974419480. Its totient is φ = 38742881280.

The previous prime is 72660225991. The next prime is 72660226013. The reversal of 72660226005 is 50062206627.

72660226005 is a `hidden beast` number, since 7 + 26 + 6 + 0 + 22 + 600 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 25363110564 + 47297115441 = 159258^2 + 217479^2 .

It is not a de Polignac number, because 72660226005 - 2⁸ = 72660225749 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 481 + ... + 381209.

It is an arithmetic number, because the mean of its divisors is an integer number (5248934145).

Almost surely, 2^72660226005 is an apocalyptic number.

It is an amenable number.

72660226005 is a deficient number, since it is larger than the sum of its proper divisors (53314193475).

72660226005 is a wasteful number, since it uses less digits than its factorization.

72660226005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384981 (or 384978 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The spelling of 72660226005 in words is "seventy-two billion, six hundred sixty million, two hundred twenty-six thousand, five".