770774665 has 4 divisors (see below), whose sum is σ = 924929604. Its totient is φ = 616619728.

The previous prime is 770774663. The next prime is 770774681. The reversal of 770774665 is 566477077.

770774665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 232349049 + 538425616 = 15243^2 + 23204^2 .

It is a cyclic number.

It is not a de Polignac number, because 770774665 - 2¹ = 770774663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (770774663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77077462 + ... + 77077471.

It is an arithmetic number, because the mean of its divisors is an integer number (231232401).

Almost surely, 2^770774665 is an apocalyptic number.

It is an amenable number.

770774665 is a deficient number, since it is larger than the sum of its proper divisors (154154939).

770774665 is a wasteful number, since it uses less digits than its factorization.

770774665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154154938.

The product of its (nonzero) digits is 1728720, while the sum is 49.

The square root of 770774665 is about 27762.8288364136. The cubic root of 770774665 is about 916.8729152805.

The spelling of 770774665 in words is "seven hundred seventy million, seven hundred seventy-four thousand, six hundred sixty-five".