6656052641 has 6 divisors (see below), whose sum is σ = 7742755170. Its totient is φ = 5705187936.

The previous prime is 6656052631. The next prime is 6656052643. The reversal of 6656052641 is 1462506566.

It can be written as a sum of positive squares in only one way, i.e., 6163035025 + 493017616 = 78505^2 + 22204^2 .

It is not a de Polignac number, because 6656052641 - 2⁶ = 6656052577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6656052643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67918856 + ... + 67918953.

It is an arithmetic number, because the mean of its divisors is an integer number (1290459195).

Almost surely, 2^6656052641 is an apocalyptic number.

It is an amenable number.

6656052641 is a deficient number, since it is larger than the sum of its proper divisors (1086702529).

6656052641 is a wasteful number, since it uses less digits than its factorization.

6656052641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135837823 (or 135837816 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 41.

The square root of 6656052641 is about 81584.6348340176. The cubic root of 6656052641 is about 1881.0727091623.

The spelling of 6656052641 in words is "six billion, six hundred fifty-six million, fifty-two thousand, six hundred forty-one".