6729372221 has 8 divisors (see below), whose sum is σ = 7905836064. Its totient is φ = 5647025520.

The previous prime is 6729372173. The next prime is 6729372257. The reversal of 6729372221 is 1222739276.

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 6729372221 - 2²⁶ = 6662263357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6729378221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23529131 + ... + 23529416.

It is an arithmetic number, because the mean of its divisors is an integer number (988229508).

Almost surely, 2^6729372221 is an apocalyptic number.

It is an amenable number.

6729372221 is a deficient number, since it is larger than the sum of its proper divisors (1176463843).

6729372221 is a wasteful number, since it uses less digits than its factorization.

6729372221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47058571.

The product of its digits is 127008, while the sum is 41.

The square root of 6729372221 is about 82032.7509047454. The cubic root of 6729372221 is about 1887.9544717136.

The spelling of 6729372221 in words is "six billion, seven hundred twenty-nine million, three hundred seventy-two thousand, two hundred twenty-one".