41661625657 has 2 divisors, whose sum is σ = 41661625658. Its totient is φ = 41661625656.

The previous prime is 41661625639. The next prime is 41661625669. The reversal of 41661625657 is 75652616614.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27959518521 + 13702107136 = 167211^2 + 117056^2 .

It is a cyclic number.

It is not a de Polignac number, because 41661625657 - 2³⁵ = 7301887289 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 41661625657.

It is not a weakly prime, because it can be changed into another prime (41661625157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20830812828 + 20830812829.

It is an arithmetic number, because the mean of its divisors is an integer number (20830812829).

Almost surely, 2^41661625657 is an apocalyptic number.

It is an amenable number.

41661625657 is a deficient number, since it is larger than the sum of its proper divisors (1).

41661625657 is an equidigital number, since it uses as much as digits as its factorization.

41661625657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1814400, while the sum is 49.

The spelling of 41661625657 in words is "forty-one billion, six hundred sixty-one million, six hundred twenty-five thousand, six hundred fifty-seven".