677779999999 has 2 divisors, whose sum is σ = 677780000000. Its totient is φ = 677779999998.

The previous prime is 677779999991. The next prime is 677780000041. The reversal of 677779999999 is 999999977776.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 677779999999 - 2³ = 677779999991 is a prime.

677779999999 is a modest number, since divided by 999999 gives 677779 as remainder.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 677779999999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (677779999991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338889999999 + 338890000000.

It is an arithmetic number, because the mean of its divisors is an integer number (338890000000).

Almost surely, 2^677779999999 is an apocalyptic number.

677779999999 is a deficient number, since it is larger than the sum of its proper divisors (1).

677779999999 is an equidigital number, since it uses as much as digits as its factorization.

677779999999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68903451414, while the sum is 97.

The spelling of 677779999999 in words is "six hundred seventy-seven billion, seven hundred seventy-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine".