681108722 has 12 divisors (see below), whose sum is σ = 1188465390. Its totient is φ = 291903696.

The previous prime is 681108709. The next prime is 681108763. The reversal of 681108722 is 227801186.

It can be written as a sum of positive squares in only one way, i.e., 560789761 + 120318961 = 23681^2 + 10969^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3474947 + ... + 3475142.

Almost surely, 2^681108722 is an apocalyptic number.

681108722 is a deficient number, since it is larger than the sum of its proper divisors (507356668).

681108722 is a wasteful number, since it uses less digits than its factorization.

681108722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6950105 (or 6950098 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 681108722 is about 26098.0597363099. The cubic root of 681108722 is about 879.8436025435.

The spelling of 681108722 in words is "six hundred eighty-one million, one hundred eight thousand, seven hundred twenty-two".