6221657888 has 12 divisors (see below), whose sum is σ = 12248889030. Its totient is φ = 3110828928.

The previous prime is 6221657887. The next prime is 6221657921. The reversal of 6221657888 is 8887561226.

It can be written as a sum of positive squares in only one way, i.e., 5995095184 + 226562704 = 77428^2 + 15052^2 .

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (6221657887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97213373 + ... + 97213436.

Almost surely, 2^6221657888 is an apocalyptic number.

It is an amenable number.

6221657888 is a deficient number, since it is larger than the sum of its proper divisors (6027231142).

6221657888 is a wasteful number, since it uses less digits than its factorization.

6221657888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194426819 (or 194426811 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 53.

The square root of 6221657888 is about 78877.4865725322. The cubic root of 6221657888 is about 1839.2271770254.

The spelling of 6221657888 in words is "six billion, two hundred twenty-one million, six hundred fifty-seven thousand, eight hundred eighty-eight".