40606305661 has 2 divisors, whose sum is σ = 40606305662. Its totient is φ = 40606305660.

The previous prime is 40606305599. The next prime is 40606305667. The reversal of 40606305661 is 16650360604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33309900100 + 7296405561 = 182510^2 + 85419^2 .

It is a cyclic number.

It is not a de Polignac number, because 40606305661 - 2⁷ = 40606305533 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40606305661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40606305667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20303152830 + 20303152831.

It is an arithmetic number, because the mean of its divisors is an integer number (20303152831).

Almost surely, 2^40606305661 is an apocalyptic number.

It is an amenable number.

40606305661 is a deficient number, since it is larger than the sum of its proper divisors (1).

40606305661 is an equidigital number, since it uses as much as digits as its factorization.

40606305661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 37.

The spelling of 40606305661 in words is "forty billion, six hundred six million, three hundred five thousand, six hundred sixty-one".