6655820590 has 16 divisors (see below), whose sum is σ = 12366944640. Its totient is φ = 2576446560.

The previous prime is 6655820573. The next prime is 6655820599. The reversal of 6655820590 is 950285566.

It is a self number, because there is not a number n which added to its sum of digits gives 6655820590.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6655820599) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10734885 + ... + 10735504.

It is an arithmetic number, because the mean of its divisors is an integer number (772934040).

Almost surely, 2^6655820590 is an apocalyptic number.

6655820590 is a deficient number, since it is larger than the sum of its proper divisors (5711124050).

6655820590 is a wasteful number, since it uses less digits than its factorization.

6655820590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21470427.

The product of its (nonzero) digits is 648000, while the sum is 46.

The square root of 6655820590 is about 81583.2126727061. The cubic root of 6655820590 is about 1881.0508488646.

The spelling of 6655820590 in words is "six billion, six hundred fifty-five million, eight hundred twenty thousand, five hundred ninety".