6721463605 has 8 divisors (see below), whose sum is σ = 8071167672. Its totient is φ = 5373563328.

The previous prime is 6721463569. The next prime is 6721463611. The reversal of 6721463605 is 5063641276.

It can be written as a sum of positive squares in 4 ways, for example, as 335695684 + 6385767921 = 18322^2 + 79911^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 6721463605 - 2⁷ = 6721463477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 442734 + ... + 457663.

It is an arithmetic number, because the mean of its divisors is an integer number (1008895959).

Almost surely, 2^6721463605 is an apocalyptic number.

It is an amenable number.

6721463605 is a deficient number, since it is larger than the sum of its proper divisors (1349704067).

6721463605 is a wasteful number, since it uses less digits than its factorization.

6721463605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901895.

The product of its (nonzero) digits is 181440, while the sum is 40.

The square root of 6721463605 is about 81984.5327180682. The cubic root of 6721463605 is about 1887.2145829852.

The spelling of 6721463605 in words is "six billion, seven hundred twenty-one million, four hundred sixty-three thousand, six hundred five".