6221668740 has 48 divisors (see below), whose sum is σ = 19909341312. Its totient is φ = 1422095616.

The previous prime is 6221668699. The next prime is 6221668741. The reversal of 6221668740 is 478661226.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 6221668692 and 6221668701.

It is not an unprimeable number, because it can be changed into a prime (6221668741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7406329 + ... + 7407168.

It is an arithmetic number, because the mean of its divisors is an integer number (414777944).

Almost surely, 2^6221668740 is an apocalyptic number.

6221668740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6221668740 is an abundant number, since it is smaller than the sum of its proper divisors (13687672572).

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

6221668740 is a wasteful number, since it uses less digits than its factorization.

6221668740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14813516 (or 14813514 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 6221668740 is about 78877.5553627266. Note that the first 3 decimals coincide. The cubic root of 6221668740 is about 1839.2282463697.

The spelling of 6221668740 in words is "six billion, two hundred twenty-one million, six hundred sixty-eight thousand, seven hundred forty".