6620478605416 has 32 divisors (see below), whose sum is σ = 13829249082600. Its totient is φ = 2950239801600.

The previous prime is 6620478605393. The next prime is 6620478605431. The reversal of 6620478605416 is 6145068740266.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4938928416900 + 1681550188516 = 2222370^2 + 1296746^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1097556435 + ... + 1097562466.

Almost surely, 2^{6620478605416} is an apocalyptic number.

It is an amenable number.

6620478605416 is an abundant number, since it is smaller than the sum of its proper divisors (7208770477184).

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

6620478605416 is a wasteful number, since it uses less digits than its factorization.

6620478605416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2195118949 (or 2195118945 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 55.

The spelling of 6620478605416 in words is "six trillion, six hundred twenty billion, four hundred seventy-eight million, six hundred five thousand, four hundred sixteen".