424101661 has 2 divisors, whose sum is σ = 424101662. Its totient is φ = 424101660.

The previous prime is 424101653. The next prime is 424101683. The reversal of 424101661 is 166101424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 356039161 + 68062500 = 18869^2 + 8250^2 .

It is a cyclic number.

It is not a de Polignac number, because 424101661 - 2³ = 424101653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (424101611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212050830 + 212050831.

It is an arithmetic number, because the mean of its divisors is an integer number (212050831).

Almost surely, 2^424101661 is an apocalyptic number.

It is an amenable number.

424101661 is a deficient number, since it is larger than the sum of its proper divisors (1).

424101661 is an equidigital number, since it uses as much as digits as its factorization.

424101661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 424101661 is about 20593.7286813243. The cubic root of 424101661 is about 751.3171881477.

The spelling of 424101661 in words is "four hundred twenty-four million, one hundred one thousand, six hundred sixty-one".