2667048721 has 4 divisors (see below), whose sum is σ = 2667926500. Its totient is φ = 2666170944.

The previous prime is 2667048701. The next prime is 2667048737. The reversal of 2667048721 is 1278407662.

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

It can be written as a sum of positive squares in 2 ways, for example, as 266048721 + 2401000000 = 16311^2 + 49000^2 .

It is a cyclic number.

It is not a de Polignac number, because 2667048721 - 2²⁵ = 2633494289 is a prime.

It is a super-2 number, since 2×2667048721² = 14226297760375471682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2667048701) 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, 434316 + ... + 440413.

It is an arithmetic number, because the mean of its divisors is an integer number (666981625).

Almost surely, 2^2667048721 is an apocalyptic number.

It is an amenable number.

2667048721 is a deficient number, since it is larger than the sum of its proper divisors (877779).

2667048721 is an equidigital number, since it uses as much as digits as its factorization.

2667048721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 877778.

The product of its (nonzero) digits is 225792, while the sum is 43.

The square root of 2667048721 is about 51643.4770421202. The cubic root of 2667048721 is about 1386.7887709587.

The spelling of 2667048721 in words is "two billion, six hundred sixty-seven million, forty-eight thousand, seven hundred twenty-one".