776669697 has 6 divisors (see below), whose sum is σ = 1121856242. Its totient is φ = 517779792.

The previous prime is 776669693. The next prime is 776669717. The reversal of 776669697 is 796966677.

It can be written as a sum of positive squares in only one way, i.e., 669981456 + 106688241 = 25884^2 + 10329^2 .

It is not a de Polignac number, because 776669697 - 2² = 776669693 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (776669693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43148308 + ... + 43148325.

Almost surely, 2^776669697 is an apocalyptic number.

It is an amenable number.

776669697 is a deficient number, since it is larger than the sum of its proper divisors (345186545).

776669697 is a wasteful number, since it uses less digits than its factorization.

776669697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86296639 (or 86296636 counting only the distinct ones).

The product of its digits is 36006768, while the sum is 63.

The square root of 776669697 is about 27868.7943226829. The cubic root of 776669697 is about 919.2044544422.

The spelling of 776669697 in words is "seven hundred seventy-six million, six hundred sixty-nine thousand, six hundred ninety-seven".