6220664240 has 40 divisors (see below), whose sum is σ = 16529195040. Its totient is φ = 2132798976.

The previous prime is 6220664237. The next prime is 6220664251. The reversal of 6220664240 is 424660226.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 6220664197 and 6220664206.

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, 5553605 + ... + 5554724.

It is an arithmetic number, because the mean of its divisors is an integer number (413229876).

Almost surely, 2^6220664240 is an apocalyptic number.

It is an amenable number.

6220664240 is an abundant number, since it is smaller than the sum of its proper divisors (10308530800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6220664240 is a wasteful number, since it uses less digits than its factorization.

6220664240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11108349 (or 11108343 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 6220664240 is about 78871.1876416223. The cubic root of 6220664240 is about 1839.1292587675.

The spelling of 6220664240 in words is "six billion, two hundred twenty million, six hundred sixty-four thousand, two hundred forty".