6646825061 has 4 divisors (see below), whose sum is σ = 6801402432. Its totient is φ = 6492247692.

The previous prime is 6646825057. The next prime is 6646825109. The reversal of 6646825061 is 1605286466.

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 6646825061 - 2² = 6646825057 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6646815061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77288621 + ... + 77288706.

It is an arithmetic number, because the mean of its divisors is an integer number (1700350608).

Almost surely, 2^6646825061 is an apocalyptic number.

It is an amenable number.

6646825061 is a deficient number, since it is larger than the sum of its proper divisors (154577371).

6646825061 is a wasteful number, since it uses less digits than its factorization.

6646825061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154577370.

The product of its (nonzero) digits is 414720, while the sum is 44.

The square root of 6646825061 is about 81528.0630274018. The cubic root of 6646825061 is about 1880.2030357337.

The spelling of 6646825061 in words is "six billion, six hundred forty-six million, eight hundred twenty-five thousand, sixty-one".