676806221620 has 24 divisors (see below), whose sum is σ = 1455958751688. Its totient is φ = 264119500800.

The previous prime is 676806221593. The next prime is 676806221629. The reversal of 676806221620 is 26122608676.

It can be written as a sum of positive squares in 4 ways, for example, as 5203025424 + 671603196196 = 72132^2 + 819514^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (676806221629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 412685901 + ... + 412687540.

It is an arithmetic number, because the mean of its divisors is an integer number (60664947987).

Almost surely, 2^676806221620 is an apocalyptic number.

It is an amenable number.

676806221620 is an abundant number, since it is smaller than the sum of its proper divisors (779152530068).

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

676806221620 is a wasteful number, since it uses less digits than its factorization.

676806221620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825373491 (or 825373489 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 46.

The spelling of 676806221620 in words is "six hundred seventy-six billion, eight hundred six million, two hundred twenty-one thousand, six hundred twenty".