774767406681 has 24 divisors (see below), whose sum is σ = 1146811270176. Its totient is φ = 503760882240.

The previous prime is 774767406607. The next prime is 774767406691. The reversal of 774767406681 is 186604767477.

774767406681 is a `hidden beast` number, since 77 + 47 + 67 + 406 + 68 + 1 = 666.

It is not a de Polignac number, because 774767406681 - 2⁹ = 774767406169 is a prime.

It is a super-2 number, since 2×774767406681² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (774767406691) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1201260 + ... + 1729901.

It is an arithmetic number, because the mean of its divisors is an integer number (47783802924).

Almost surely, 2^774767406681 is an apocalyptic number.

It is an amenable number.

774767406681 is a deficient number, since it is larger than the sum of its proper divisors (372043863495).

774767406681 is a wasteful number, since it uses less digits than its factorization.

774767406681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2931893 (or 2931890 counting only the distinct ones).

The product of its (nonzero) digits is 66382848, while the sum is 63.

The spelling of 774767406681 in words is "seven hundred seventy-four billion, seven hundred sixty-seven million, four hundred six thousand, six hundred eighty-one".