771516668 has 24 divisors (see below), whose sum is σ = 1460554368. Its totient is φ = 354482496.

The previous prime is 771516649. The next prime is 771516673. The reversal of 771516668 is 866615177.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21671 + ... + 44862.

It is an arithmetic number, because the mean of its divisors is an integer number (60856432).

Almost surely, 2^771516668 is an apocalyptic number.

It is an amenable number.

771516668 is a deficient number, since it is larger than the sum of its proper divisors (689037700).

771516668 is a wasteful number, since it uses less digits than its factorization.

771516668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66773 (or 66771 counting only the distinct ones).

The product of its digits is 423360, while the sum is 47.

The square root of 771516668 is about 27776.1888674454. The cubic root of 771516668 is about 917.1670368062.

The spelling of 771516668 in words is "seven hundred seventy-one million, five hundred sixteen thousand, six hundred sixty-eight".