677646842 has 8 divisors (see below), whose sum is σ = 1016894676. Its totient is φ = 338681952.

The previous prime is 677646839. The next prime is 677646863. The reversal of 677646842 is 248646776.

It can be written as a sum of positive squares in 2 ways, for example, as 607573201 + 70073641 = 24649^2 + 8371^2 .

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 64643 + ... + 74390.

Almost surely, 2^677646842 is an apocalyptic number.

677646842 is a deficient number, since it is larger than the sum of its proper divisors (339247834).

677646842 is a wasteful number, since it uses less digits than its factorization.

677646842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141472.

The product of its digits is 2709504, while the sum is 50.

The square root of 677646842 is about 26031.6507736256. The cubic root of 677646842 is about 878.3504057435.

The spelling of 677646842 in words is "six hundred seventy-seven million, six hundred forty-six thousand, eight hundred forty-two".