42336301661 has 2 divisors, whose sum is σ = 42336301662. Its totient is φ = 42336301660.

The previous prime is 42336301607. The next prime is 42336301663. The reversal of 42336301661 is 16610363324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38419920100 + 3916381561 = 196010^2 + 62581^2 .

It is a cyclic number.

It is not a de Polignac number, because 42336301661 - 2⁶ = 42336301597 is a prime.

Together with 42336301663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42336301663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21168150830 + 21168150831.

It is an arithmetic number, because the mean of its divisors is an integer number (21168150831).

Almost surely, 2^42336301661 is an apocalyptic number.

It is an amenable number.

42336301661 is a deficient number, since it is larger than the sum of its proper divisors (1).

42336301661 is an equidigital number, since it uses as much as digits as its factorization.

42336301661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 35.

Adding to 42336301661 its reverse (16610363324), we get a palindrome (58946664985).

The spelling of 42336301661 in words is "forty-two billion, three hundred thirty-six million, three hundred one thousand, six hundred sixty-one".