27726721067 has 6 divisors (see below), whose sum is σ = 28649984364. Its totient is φ = 26832309780.

The previous prime is 27726721039. The next prime is 27726721073. The reversal of 27726721067 is 76012762772.

It is not a de Polignac number, because 27726721067 - 2⁶ = 27726721003 is a prime.

It is a super-2 number, since 2×27726721067² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27726721367) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14425013 + ... + 14426934.

It is an arithmetic number, because the mean of its divisors is an integer number (4774997394).

Almost surely, 2^27726721067 is an apocalyptic number.

27726721067 is a deficient number, since it is larger than the sum of its proper divisors (923263297).

27726721067 is an equidigital number, since it uses as much as digits as its factorization.

27726721067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28852009 (or 28851978 counting only the distinct ones).

The product of its (nonzero) digits is 691488, while the sum is 47.

The spelling of 27726721067 in words is "twenty-seven billion, seven hundred twenty-six million, seven hundred twenty-one thousand, sixty-seven".