40707661 has 2 divisors, whose sum is σ = 40707662. Its totient is φ = 40707660.

The previous prime is 40707617. The next prime is 40707697. The reversal of 40707661 is 16670704.

40707661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39312900 + 1394761 = 6270^2 + 1181^2 .

It is a cyclic number.

It is not a de Polignac number, because 40707661 - 2¹³ = 40699469 is a prime.

It is a super-2 number, since 2×40707661² = 3314227328181842, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40707461) 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, 20353830 + 20353831.

It is an arithmetic number, because the mean of its divisors is an integer number (20353831).

Almost surely, 2^40707661 is an apocalyptic number.

It is an amenable number.

40707661 is a deficient number, since it is larger than the sum of its proper divisors (1).

40707661 is an equidigital number, since it uses as much as digits as its factorization.

40707661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 40707661 is about 6380.2555591449. The cubic root of 40707661 is about 344.0002168964. Note that the first 3 decimals are identical.

The spelling of 40707661 in words is "forty million, seven hundred seven thousand, six hundred sixty-one".