911910661 has 2 divisors, whose sum is σ = 911910662. Its totient is φ = 911910660.

The previous prime is 911910641. The next prime is 911910689. The reversal of 911910661 is 166019119.

911910661 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., 718561636 + 193349025 = 26806^2 + 13905^2 .

It is a cyclic number.

It is not a de Polignac number, because 911910661 - 2¹³ = 911902469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (911910611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 455955330 + 455955331.

It is an arithmetic number, because the mean of its divisors is an integer number (455955331).

Almost surely, 2^911910661 is an apocalyptic number.

It is an amenable number.

911910661 is a deficient number, since it is larger than the sum of its proper divisors (1).

911910661 is an equidigital number, since it uses as much as digits as its factorization.

911910661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 34.

The square root of 911910661 is about 30197.8585499038. The cubic root of 911910661 is about 969.7298503722.

The spelling of 911910661 in words is "nine hundred eleven million, nine hundred ten thousand, six hundred sixty-one".