677751681 has 32 divisors (see below), whose sum is σ = 957052800. Its totient is φ = 426069504.

The previous prime is 677751673. The next prime is 677751691. The reversal of 677751681 is 186157776.

It is a happy number.

It is not a de Polignac number, because 677751681 - 2³ = 677751673 is a prime.

It is a super-2 number, since 2×677751681² = 918694682196651522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 677751681.

It is not an unprimeable number, because it can be changed into a prime (677751601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 710701 + ... + 711653.

It is an arithmetic number, because the mean of its divisors is an integer number (29907900).

Almost surely, 2^677751681 is an apocalyptic number.

It is an amenable number.

677751681 is a deficient number, since it is larger than the sum of its proper divisors (279301119).

677751681 is a wasteful number, since it uses less digits than its factorization.

677751681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1185.

The product of its digits is 493920, while the sum is 48.

The square root of 677751681 is about 26033.6643790305. The cubic root of 677751681 is about 878.3957000492.

The spelling of 677751681 in words is "six hundred seventy-seven million, seven hundred fifty-one thousand, six hundred eighty-one".