40669616917 has 2 divisors, whose sum is σ = 40669616918. Its totient is φ = 40669616916.

The previous prime is 40669616887. The next prime is 40669616927. The reversal of 40669616917 is 71961696604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40653043876 + 16573041 = 201626^2 + 4071^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40669616917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40669616927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20334808458 + 20334808459.

It is an arithmetic number, because the mean of its divisors is an integer number (20334808459).

Almost surely, 2^40669616917 is an apocalyptic number.

It is an amenable number.

40669616917 is a deficient number, since it is larger than the sum of its proper divisors (1).

40669616917 is an equidigital number, since it uses as much as digits as its factorization.

40669616917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2939328, while the sum is 55.

The spelling of 40669616917 in words is "forty billion, six hundred sixty-nine million, six hundred sixteen thousand, nine hundred seventeen".