40798661 has 2 divisors, whose sum is σ = 40798662. Its totient is φ = 40798660.

The previous prime is 40798651. The next prime is 40798687. The reversal of 40798661 is 16689704.

40798661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24750625 + 16048036 = 4975^2 + 4006^2 .

It is a cyclic number.

It is not a de Polignac number, because 40798661 - 2²² = 36604357 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40798631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20399330 + 20399331.

It is an arithmetic number, because the mean of its divisors is an integer number (20399331).

Almost surely, 2^40798661 is an apocalyptic number.

It is an amenable number.

40798661 is a deficient number, since it is larger than the sum of its proper divisors (1).

40798661 is an equidigital number, since it uses as much as digits as its factorization.

40798661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 40798661 is about 6387.3829539178. The cubic root of 40798661 is about 344.2563580558.

The spelling of 40798661 in words is "forty million, seven hundred ninety-eight thousand, six hundred sixty-one".