66872272853 has 16 divisors (see below), whose sum is σ = 71051223600. Its totient is φ = 62720802816.

The previous prime is 66872272807. The next prime is 66872272897. The reversal of 66872272853 is 35827227866.

It can be written as a sum of positive squares in 8 ways, for example, as 18328285924 + 48543986929 = 135382^2 + 220327^2 .

It is a cyclic number.

It is not a de Polignac number, because 66872272853 - 2¹⁴ = 66872256469 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 (66872772853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18610025 + ... + 18613617.

It is an arithmetic number, because the mean of its divisors is an integer number (4440701475).

Almost surely, 2^66872272853 is an apocalyptic number.

It is an amenable number.

66872272853 is a deficient number, since it is larger than the sum of its proper divisors (4178950747).

66872272853 is a wasteful number, since it uses less digits than its factorization.

66872272853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7096.

The product of its digits is 13547520, while the sum is 56.

The spelling of 66872272853 in words is "sixty-six billion, eight hundred seventy-two million, two hundred seventy-two thousand, eight hundred fifty-three".