766413562561 has 16 divisors (see below), whose sum is σ = 819300303360. Its totient is φ = 715159751680.

The previous prime is 766413562513. The next prime is 766413562573. The reversal of 766413562561 is 165265314667.

766413562561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 766413562561 - 2¹⁹ = 766413038273 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 766413562499 and 766413562508.

It is not an unprimeable number, because it can be changed into a prime (766413562511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21934641 + ... + 21969553.

It is an arithmetic number, because the mean of its divisors is an integer number (51206268960).

Almost surely, 2^766413562561 is an apocalyptic number.

It is an amenable number.

766413562561 is a deficient number, since it is larger than the sum of its proper divisors (52886740799).

766413562561 is a wasteful number, since it uses less digits than its factorization.

766413562561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58256.

The product of its digits is 5443200, while the sum is 52.

The spelling of 766413562561 in words is "seven hundred sixty-six billion, four hundred thirteen million, five hundred sixty-two thousand, five hundred sixty-one".