676821786 has 8 divisors (see below), whose sum is σ = 1353643584. Its totient is φ = 225607260.

The previous prime is 676821773. The next prime is 676821787. The reversal of 676821786 is 687128676.

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

676821786 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (676821787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56401810 + ... + 56401821.

It is an arithmetic number, because the mean of its divisors is an integer number (169205448).

Almost surely, 2^676821786 is an apocalyptic number.

676821786 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

676821786 is a wasteful number, since it uses less digits than its factorization.

676821786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112803636.

The product of its digits is 1354752, while the sum is 51.

The square root of 676821786 is about 26015.7987768971. The cubic root of 676821786 is about 877.9937880400.

The spelling of 676821786 in words is "six hundred seventy-six million, eight hundred twenty-one thousand, seven hundred eighty-six".