10766401561 has 2 divisors, whose sum is σ = 10766401562. Its totient is φ = 10766401560.

The previous prime is 10766401493. The next prime is 10766401577. The reversal of 10766401561 is 16510466701.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7317775936 + 3448625625 = 85544^2 + 58725^2 .

It is a cyclic number.

It is not a de Polignac number, because 10766401561 - 2⁹ = 10766401049 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10766401561.

It is not a weakly prime, because it can be changed into another prime (10766501561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5383200780 + 5383200781.

It is an arithmetic number, because the mean of its divisors is an integer number (5383200781).

Almost surely, 2^10766401561 is an apocalyptic number.

It is an amenable number.

10766401561 is a deficient number, since it is larger than the sum of its proper divisors (1).

10766401561 is an equidigital number, since it uses as much as digits as its factorization.

10766401561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 37.

The spelling of 10766401561 in words is "ten billion, seven hundred sixty-six million, four hundred one thousand, five hundred sixty-one".