72665134329 has 4 divisors (see below), whose sum is σ = 96886845776. Its totient is φ = 48443422884.

The previous prime is 72665134319. The next prime is 72665134331. The reversal of 72665134329 is 92343156627.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 72665134329 - 2¹⁶ = 72665068793 is a prime.

It is a super-2 number, since 2×72665134329² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72665134319) 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, 12110855719 + ... + 12110855724.

It is an arithmetic number, because the mean of its divisors is an integer number (24221711444).

Almost surely, 2^72665134329 is an apocalyptic number.

It is an amenable number.

72665134329 is a deficient number, since it is larger than the sum of its proper divisors (24221711447).

72665134329 is a wasteful number, since it uses less digits than its factorization.

72665134329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24221711446.

The product of its digits is 1632960, while the sum is 48.

The spelling of 72665134329 in words is "seventy-two billion, six hundred sixty-five million, one hundred thirty-four thousand, three hundred twenty-nine".