41661625669 has 2 divisors, whose sum is σ = 41661625670. Its totient is φ = 41661625668.

The previous prime is 41661625657. The next prime is 41661625699. The reversal of 41661625669 is 96652616614.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36950450625 + 4711175044 = 192225^2 + 68638^2 .

It is a cyclic number.

It is not a de Polignac number, because 41661625669 - 2⁷ = 41661625541 is a prime.

It is a super-2 number, since 2×41661625669² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41661625639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20830812834 + 20830812835.

It is an arithmetic number, because the mean of its divisors is an integer number (20830812835).

Almost surely, 2^41661625669 is an apocalyptic number.

It is an amenable number.

41661625669 is a deficient number, since it is larger than the sum of its proper divisors (1).

41661625669 is an equidigital number, since it uses as much as digits as its factorization.

41661625669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2799360, while the sum is 52.

The spelling of 41661625669 in words is "forty-one billion, six hundred sixty-one million, six hundred twenty-five thousand, six hundred sixty-nine".