6720712261 has 4 divisors (see below), whose sum is σ = 6724194624. Its totient is φ = 6717229900.

The previous prime is 6720712241. The next prime is 6720712283. The reversal of 6720712261 is 1622170276.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6720712261 - 2¹⁹ = 6720187973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6720712211) 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, 1738285 + ... + 1742146.

It is an arithmetic number, because the mean of its divisors is an integer number (1681048656).

Almost surely, 2^6720712261 is an apocalyptic number.

It is an amenable number.

6720712261 is a deficient number, since it is larger than the sum of its proper divisors (3482363).

6720712261 is a wasteful number, since it uses less digits than its factorization.

6720712261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3482362.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 6720712261 is about 81979.9503598288. The cubic root of 6720712261 is about 1887.1442609901.

The spelling of 6720712261 in words is "six billion, seven hundred twenty million, seven hundred twelve thousand, two hundred sixty-one".