40328700661 has 2 divisors, whose sum is σ = 40328700662. Its totient is φ = 40328700660.

The previous prime is 40328700647. The next prime is 40328700689. The reversal of 40328700661 is 16600782304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23621845636 + 16706855025 = 153694^2 + 129255^2 .

It is a cyclic number.

It is not a de Polignac number, because 40328700661 - 2⁹ = 40328700149 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40328700661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40328700691) 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, 20164350330 + 20164350331.

It is an arithmetic number, because the mean of its divisors is an integer number (20164350331).

Almost surely, 2^40328700661 is an apocalyptic number.

It is an amenable number.

40328700661 is a deficient number, since it is larger than the sum of its proper divisors (1).

40328700661 is an equidigital number, since it uses as much as digits as its factorization.

40328700661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 37.

The spelling of 40328700661 in words is "forty billion, three hundred twenty-eight million, seven hundred thousand, six hundred sixty-one".