774066661 has 8 divisors (see below), whose sum is σ = 827121240. Its totient is φ = 721847808.

The previous prime is 774066647. The next prime is 774066691. The reversal of 774066661 is 166660477.

774066661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 155002500 + 619064161 = 12450^2 + 24881^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 774066661 - 2¹⁵ = 774033893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (774066691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 207016 + ... + 210721.

It is an arithmetic number, because the mean of its divisors is an integer number (103390155).

Almost surely, 2^774066661 is an apocalyptic number.

It is an amenable number.

774066661 is a deficient number, since it is larger than the sum of its proper divisors (53054579).

774066661 is a wasteful number, since it uses less digits than its factorization.

774066661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417863.

The product of its (nonzero) digits is 254016, while the sum is 43.

The square root of 774066661 is about 27822.0535007752. The cubic root of 774066661 is about 918.1763896240.

The spelling of 774066661 in words is "seven hundred seventy-four million, sixty-six thousand, six hundred sixty-one".