6620099944 has 16 divisors (see below), whose sum is σ = 12535586820. Its totient is φ = 3277276800.

The previous prime is 6620099921. The next prime is 6620099971. The reversal of 6620099944 is 4499900266.

It can be written as a sum of positive squares in 2 ways, for example, as 6619775044 + 324900 = 81362^2 + 570^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4095789 + ... + 4097404.

Almost surely, 2^6620099944 is an apocalyptic number.

It is an amenable number.

6620099944 is a deficient number, since it is larger than the sum of its proper divisors (5915486876).

6620099944 is a wasteful number, since it uses less digits than its factorization.

6620099944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8193300 (or 8193296 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 49.

The square root of 6620099944 is about 81363.9966078363. The cubic root of 6620099944 is about 1877.6797186124.

The spelling of 6620099944 in words is "six billion, six hundred twenty million, ninety-nine thousand, nine hundred forty-four".