6240666221 has 8 divisors (see below), whose sum is σ = 6629293440. Its totient is φ = 5854431168.

The previous prime is 6240666191. The next prime is 6240666227. The reversal of 6240666221 is 1226660426.

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

It is not a de Polignac number, because 6240666221 - 2¹⁸ = 6240404077 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 (6240666227) 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, 592661 + ... + 603098.

It is an arithmetic number, because the mean of its divisors is an integer number (828661680).

Almost surely, 2^6240666221 is an apocalyptic number.

It is an amenable number.

6240666221 is a deficient number, since it is larger than the sum of its proper divisors (388627219).

6240666221 is a wasteful number, since it uses less digits than its factorization.

6240666221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1196083.

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 6240666221 is about 78997.8874464375. The cubic root of 6240666221 is about 1841.0983341889.

The spelling of 6240666221 in words is "six billion, two hundred forty million, six hundred sixty-six thousand, two hundred twenty-one".