682778691 has 18 divisors (see below), whose sum is σ = 1147254732. Its totient is φ = 390159000.

The previous prime is 682778669. The next prime is 682778693. The reversal of 682778691 is 196877286.

It is not a de Polignac number, because 682778691 - 2⁵ = 682778659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (682778693) 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 17 ways as a sum of consecutive naturals, for example, 773685 + ... + 774566.

It is an arithmetic number, because the mean of its divisors is an integer number (63736374).

Almost surely, 2^682778691 is an apocalyptic number.

682778691 is a deficient number, since it is larger than the sum of its proper divisors (464476041).

682778691 is a wasteful number, since it uses less digits than its factorization.

682778691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1548271 (or 1548261 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 54.

The square root of 682778691 is about 26130.0342709305. The cubic root of 682778691 is about 880.5620939718.

The spelling of 682778691 in words is "six hundred eighty-two million, seven hundred seventy-eight thousand, six hundred ninety-one".