682508106221 has 4 divisors (see below), whose sum is σ = 700954271292. Its totient is φ = 664061941152.

The previous prime is 682508106211. The next prime is 682508106229. The reversal of 682508106221 is 122601805286.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 519949155625 + 162558950596 = 721075^2 + 403186^2 .

It is a cyclic number.

It is not a de Polignac number, because 682508106221 - 2⁶ = 682508106157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (682508106229) 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, 9223082480 + ... + 9223082553.

It is an arithmetic number, because the mean of its divisors is an integer number (175238567823).

Almost surely, 2^682508106221 is an apocalyptic number.

It is an amenable number.

682508106221 is a deficient number, since it is larger than the sum of its proper divisors (18446165071).

682508106221 is a wasteful number, since it uses less digits than its factorization.

682508106221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18446165070.

The product of its (nonzero) digits is 92160, while the sum is 41.

The spelling of 682508106221 in words is "six hundred eighty-two billion, five hundred eight million, one hundred six thousand, two hundred twenty-one".