6650551561506 has 16 divisors (see below), whose sum is σ = 13303214820000. Its totient is φ = 2216498571008.

The previous prime is 6650551561457. The next prime is 6650551561541. The reversal of 6650551561506 is 6051651550566.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87946431 + ... + 88022018.

It is an arithmetic number, because the mean of its divisors is an integer number (831450926250).

Almost surely, 2^{6650551561506} is an apocalyptic number.

6650551561506 is an abundant number, since it is smaller than the sum of its proper divisors (6652663258494).

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

6650551561506 is a wasteful number, since it uses less digits than its factorization.

6650551561506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175974753.

The product of its (nonzero) digits is 4050000, while the sum is 51.

The spelling of 6650551561506 in words is "six trillion, six hundred fifty billion, five hundred fifty-one million, five hundred sixty-one thousand, five hundred six".