774644661 has 64 divisors (see below), whose sum is σ = 1415232000. Its totient is φ = 408665088.

The previous prime is 774644659. The next prime is 774644677. The reversal of 774644661 is 166446477.

774644661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 774644661 - 2¹ = 774644659 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (774644261) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 168015 + ... + 172563.

It is an arithmetic number, because the mean of its divisors is an integer number (22113000).

Almost surely, 2^774644661 is an apocalyptic number.

It is an amenable number.

774644661 is a deficient number, since it is larger than the sum of its proper divisors (640587339).

774644661 is a wasteful number, since it uses less digits than its factorization.

774644661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4635 (or 4629 counting only the distinct ones).

The product of its digits is 677376, while the sum is 45.

The square root of 774644661 is about 27832.4390055920. The cubic root of 774644661 is about 918.4048686173.

The spelling of 774644661 in words is "seven hundred seventy-four million, six hundred forty-four thousand, six hundred sixty-one".