77406568 has 32 divisors (see below), whose sum is σ = 151569000. Its totient is φ = 37013760.

The previous prime is 77406521. The next prime is 77406583. The reversal of 77406568 is 86560477.

It can be written as a sum of positive squares in 4 ways, for example, as 77404804 + 1764 = 8798^2 + 42^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 23758 + ... + 26818.

Almost surely, 2^77406568 is an apocalyptic number.

It is an amenable number.

77406568 is a deficient number, since it is larger than the sum of its proper divisors (74162432).

77406568 is a wasteful number, since it uses less digits than its factorization.

77406568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3205 (or 3201 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 43.

The square root of 77406568 is about 8798.1002494857. The cubic root of 77406568 is about 426.1795476993.

The spelling of 77406568 in words is "seventy-seven million, four hundred six thousand, five hundred sixty-eight".