2720866791 has 4 divisors (see below), whose sum is σ = 3627822392. Its totient is φ = 1813911192.

The previous prime is 2720866789. The next prime is 2720866831. The reversal of 2720866791 is 1976680272.

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

It is not a de Polignac number, because 2720866791 - 2¹ = 2720866789 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2720866791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2720866751) 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, 453477796 + ... + 453477801.

It is an arithmetic number, because the mean of its divisors is an integer number (906955598).

Almost surely, 2^2720866791 is an apocalyptic number.

2720866791 is a deficient number, since it is larger than the sum of its proper divisors (906955601).

2720866791 is an equidigital number, since it uses as much as digits as its factorization.

2720866791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906955600.

The product of its (nonzero) digits is 508032, while the sum is 48.

The square root of 2720866791 is about 52161.9285590554. The cubic root of 2720866791 is about 1396.0546729367.

The spelling of 2720866791 in words is "two billion, seven hundred twenty million, eight hundred sixty-six thousand, seven hundred ninety-one".