6650155606561 has 4 divisors (see below), whose sum is σ = 7000163796400. Its totient is φ = 6300147416724.

The previous prime is 6650155606537. The next prime is 6650155606579. The reversal of 6650155606561 is 1656065510566.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6650155606561 - 2⁵ = 6650155606529 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6650155606499 and 6650155606508.

It is not an unprimeable number, because it can be changed into a prime (6650155606261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175004094891 + ... + 175004094928.

It is an arithmetic number, because the mean of its divisors is an integer number (1750040949100).

Almost surely, 2^{6650155606561} is an apocalyptic number.

It is an amenable number.

6650155606561 is a deficient number, since it is larger than the sum of its proper divisors (350008189839).

6650155606561 is a wasteful number, since it uses less digits than its factorization.

6650155606561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350008189838.

The product of its (nonzero) digits is 4860000, while the sum is 52.

The spelling of 6650155606561 in words is "six trillion, six hundred fifty billion, one hundred fifty-five million, six hundred six thousand, five hundred sixty-one".