77311866 has 16 divisors (see below), whose sum is σ = 154756800. Its totient is φ = 25748448.

The previous prime is 77311837. The next prime is 77311867. The reversal of 77311866 is 66811377.

It is not an unprimeable number, because it can be changed into a prime (77311867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3030 + ... + 12798.

It is an arithmetic number, because the mean of its divisors is an integer number (9672300).

Almost surely, 2^77311866 is an apocalyptic number.

77311866 is an abundant number, since it is smaller than the sum of its proper divisors (77444934).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77311866 is a wasteful number, since it uses less digits than its factorization.

77311866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11093.

The product of its digits is 42336, while the sum is 39.

The square root of 77311866 is about 8792.7166450421. The cubic root of 77311866 is about 426.0056756060.

The spelling of 77311866 in words is "seventy-seven million, three hundred eleven thousand, eight hundred sixty-six".