6620345446540 has 48 divisors (see below), whose sum is σ = 15889991507712. Its totient is φ = 2269666662336.

The previous prime is 6620345446537. The next prime is 6620345446541. The reversal of 6620345446540 is 456445430266.

It is not an unprimeable number, because it can be changed into a prime (6620345446541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198267 + ... + 3644173.

It is an arithmetic number, because the mean of its divisors is an integer number (331041489744).

Almost surely, 2^{6620345446540} is an apocalyptic number.

It is an amenable number.

6620345446540 is an abundant number, since it is smaller than the sum of its proper divisors (9269646061172).

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

6620345446540 is a wasteful number, since it uses less digits than its factorization.

6620345446540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3459646 (or 3459644 counting only the distinct ones).

The product of its (nonzero) digits is 8294400, while the sum is 49.

The spelling of 6620345446540 in words is "six trillion, six hundred twenty billion, three hundred forty-five million, four hundred forty-six thousand, five hundred forty".