10166560991 has 2 divisors, whose sum is σ = 10166560992. Its totient is φ = 10166560990.

The previous prime is 10166560969. The next prime is 10166561063. The reversal of 10166560991 is 19906566101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10166560991 - 2⁶ = 10166560927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10166560931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5083280495 + 5083280496.

It is an arithmetic number, because the mean of its divisors is an integer number (5083280496).

Almost surely, 2^10166560991 is an apocalyptic number.

10166560991 is a deficient number, since it is larger than the sum of its proper divisors (1).

10166560991 is an equidigital number, since it uses as much as digits as its factorization.

10166560991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87480, while the sum is 44.

The spelling of 10166560991 in words is "ten billion, one hundred sixty-six million, five hundred sixty thousand, nine hundred ninety-one".