27220664723 has 4 divisors (see below), whose sum is σ = 31109331120. Its totient is φ = 23331998328.

The previous prime is 27220664701. The next prime is 27220664767. The reversal of 27220664723 is 32746602272.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27220664723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27220664423) 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, 1944333188 + ... + 1944333201.

It is an arithmetic number, because the mean of its divisors is an integer number (7777332780).

Almost surely, 2^27220664723 is an apocalyptic number.

27220664723 is a deficient number, since it is larger than the sum of its proper divisors (3888666397).

27220664723 is an equidigital number, since it uses as much as digits as its factorization.

27220664723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3888666396.

The product of its (nonzero) digits is 338688, while the sum is 41.

The spelling of 27220664723 in words is "twenty-seven billion, two hundred twenty million, six hundred sixty-four thousand, seven hundred twenty-three".