681108766 has 16 divisors (see below), whose sum is σ = 1100683584. Its totient is φ = 314234784.

The previous prime is 681108763. The next prime is 681108767. The reversal of 681108766 is 667801186.

It is a super-2 number, since 2×681108766² = 927818302244085512, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681108763) 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, 121620 + ... + 127096.

It is an arithmetic number, because the mean of its divisors is an integer number (68792724).

Almost surely, 2^681108766 is an apocalyptic number.

681108766 is a deficient number, since it is larger than the sum of its proper divisors (419574818).

681108766 is a wasteful number, since it uses less digits than its factorization.

681108766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10275.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 681108766 is about 26098.0605792844. The cubic root of 681108766 is about 879.8436214896.

The spelling of 681108766 in words is "six hundred eighty-one million, one hundred eight thousand, seven hundred sixty-six".