72297166247 has 4 divisors (see below), whose sum is σ = 76102280280. Its totient is φ = 68492052216.

The previous prime is 72297166223. The next prime is 72297166273. The reversal of 72297166247 is 74266179227.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72297166247 - 2²⁰ = 72296117671 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 (72297166847) 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, 1902556988 + ... + 1902557025.

It is an arithmetic number, because the mean of its divisors is an integer number (19025570070).

Almost surely, 2^72297166247 is an apocalyptic number.

72297166247 is a deficient number, since it is larger than the sum of its proper divisors (3805114033).

72297166247 is a wasteful number, since it uses less digits than its factorization.

72297166247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3805114032.

The product of its digits is 3556224, while the sum is 53.

The spelling of 72297166247 in words is "seventy-two billion, two hundred ninety-seven million, one hundred sixty-six thousand, two hundred forty-seven".