77669866 has 8 divisors (see below), whose sum is σ = 117018720. Its totient is φ = 38663628.

The previous prime is 77669831. The next prime is 77669903. The reversal of 77669866 is 66896677.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85086 + ... + 85993.

It is an arithmetic number, because the mean of its divisors is an integer number (14627340).

Almost surely, 2^77669866 is an apocalyptic number.

77669866 is a deficient number, since it is larger than the sum of its proper divisors (39348854).

77669866 is a wasteful number, since it uses less digits than its factorization.

77669866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171308.

The product of its digits is 4572288, while the sum is 55.

The square root of 77669866 is about 8813.0508905827. The cubic root of 77669866 is about 426.6622166148.

The spelling of 77669866 in words is "seventy-seven million, six hundred sixty-nine thousand, eight hundred sixty-six".