6619555412 has 12 divisors (see below), whose sum is σ = 11592282240. Its totient is φ = 3307474776.

The previous prime is 6619555391. The next prime is 6619555427. The reversal of 6619555412 is 2145559166.

It is a congruent number.

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, 569258 + ... + 580769.

It is an arithmetic number, because the mean of its divisors is an integer number (966023520).

Almost surely, 2^6619555412 is an apocalyptic number.

It is an amenable number.

6619555412 is a deficient number, since it is larger than the sum of its proper divisors (4972726828).

6619555412 is a wasteful number, since it uses less digits than its factorization.

6619555412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151470 (or 1151468 counting only the distinct ones).

The product of its digits is 324000, while the sum is 44.

The square root of 6619555412 is about 81360.6502678045. The cubic root of 6619555412 is about 1877.6282347609.

The spelling of 6619555412 in words is "six billion, six hundred nineteen million, five hundred fifty-five thousand, four hundred twelve".