412651661 has 2 divisors, whose sum is σ = 412651662. Its totient is φ = 412651660.

The previous prime is 412651597. The next prime is 412651669. The reversal of 412651661 is 166156214.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 407838025 + 4813636 = 20195^2 + 2194^2 .

It is a cyclic number.

It is not a de Polignac number, because 412651661 - 2⁶ = 412651597 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (412651669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 206325830 + 206325831.

It is an arithmetic number, because the mean of its divisors is an integer number (206325831).

Almost surely, 2^412651661 is an apocalyptic number.

It is an amenable number.

412651661 is a deficient number, since it is larger than the sum of its proper divisors (1).

412651661 is an equidigital number, since it uses as much as digits as its factorization.

412651661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 32.

The square root of 412651661 is about 20313.8293041957. The cubic root of 412651661 is about 744.4939950921.

The spelling of 412651661 in words is "four hundred twelve million, six hundred fifty-one thousand, six hundred sixty-one".