6821648662 has 4 divisors (see below), whose sum is σ = 10232472996. Its totient is φ = 3410824330.

The previous prime is 6821648653. The next prime is 6821648677. The reversal of 6821648662 is 2668461286.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1705412164 + ... + 1705412167.

It is an arithmetic number, because the mean of its divisors is an integer number (2558118249).

Almost surely, 2^6821648662 is an apocalyptic number.

6821648662 is a deficient number, since it is larger than the sum of its proper divisors (3410824334).

6821648662 is a wasteful number, since it uses less digits than its factorization.

6821648662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3410824333.

The product of its digits is 1327104, while the sum is 49.

The square root of 6821648662 is about 82593.2724984305. The cubic root of 6821648662 is about 1896.5448435868.

The spelling of 6821648662 in words is "six billion, eight hundred twenty-one million, six hundred forty-eight thousand, six hundred sixty-two".