681527686 has 8 divisors (see below), whose sum is σ = 1168333200. Its totient is φ = 292083288.

The previous prime is 681527681. The next prime is 681527731. The reversal of 681527686 is 686725186.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681527681) 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, 24340261 + ... + 24340288.

It is an arithmetic number, because the mean of its divisors is an integer number (146041650).

Almost surely, 2^681527686 is an apocalyptic number.

681527686 is a deficient number, since it is larger than the sum of its proper divisors (486805514).

681527686 is a wasteful number, since it uses less digits than its factorization.

681527686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48680558.

The product of its digits is 967680, while the sum is 49.

The square root of 681527686 is about 26106.0852293100. The cubic root of 681527686 is about 880.0239688719.

The spelling of 681527686 in words is "six hundred eighty-one million, five hundred twenty-seven thousand, six hundred eighty-six".