677643866 has 8 divisors (see below), whose sum is σ = 1016873760. Its totient is φ = 338685948.

The previous prime is 677643853. The next prime is 677643887. The reversal of 677643866 is 668346776.

It is a happy number.

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

It is a Curzon number.

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 3 ways as a sum of consecutive naturals, for example, 61646 + ... + 71801.

It is an arithmetic number, because the mean of its divisors is an integer number (127109220).

Almost surely, 2^677643866 is an apocalyptic number.

677643866 is a deficient number, since it is larger than the sum of its proper divisors (339229894).

677643866 is a wasteful number, since it uses less digits than its factorization.

677643866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135988.

The product of its digits is 6096384, while the sum is 53.

The square root of 677643866 is about 26031.5936123780. The cubic root of 677643866 is about 878.3491199338.

The spelling of 677643866 in words is "six hundred seventy-seven million, six hundred forty-three thousand, eight hundred sixty-six".