77189668 has 12 divisors (see below), whose sum is σ = 136710000. Its totient is φ = 38129672.

The previous prime is 77189657. The next prime is 77189669. The reversal of 77189668 is 86698177.

It is not an unprimeable number, because it can be changed into a prime (77189669) 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 3 ways as a sum of consecutive naturals, for example, 115918 + ... + 116581.

It is an arithmetic number, because the mean of its divisors is an integer number (11392500).

Almost surely, 2^77189668 is an apocalyptic number.

It is an amenable number.

77189668 is a deficient number, since it is larger than the sum of its proper divisors (59520332).

77189668 is a wasteful number, since it uses less digits than its factorization.

77189668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232586 (or 232584 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 52.

The square root of 77189668 is about 8785.7650776697. The cubic root of 77189668 is about 425.7811111451.

The spelling of 77189668 in words is "seventy-seven million, one hundred eighty-nine thousand, six hundred sixty-eight".