2662686721 has 8 divisors (see below), whose sum is σ = 2734249760. Its totient is φ = 2591561952.

The previous prime is 2662686703. The next prime is 2662686787. The reversal of 2662686721 is 1276862662.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2662686721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2662683721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97236 + ... + 121573.

It is an arithmetic number, because the mean of its divisors is an integer number (341781220).

Almost surely, 2^2662686721 is an apocalyptic number.

It is an amenable number.

2662686721 is a deficient number, since it is larger than the sum of its proper divisors (71563039).

2662686721 is a wasteful number, since it uses less digits than its factorization.

2662686721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219135.

The product of its digits is 580608, while the sum is 46.

The square root of 2662686721 is about 51601.2279020567. The cubic root of 2662686721 is about 1386.0323201535.

The spelling of 2662686721 in words is "two billion, six hundred sixty-two million, six hundred eighty-six thousand, seven hundred twenty-one".