6681959157 has 16 divisors (see below), whose sum is σ = 9652737600. Its totient is φ = 4095098112.

The previous prime is 6681959143. The next prime is 6681959173. The reversal of 6681959157 is 7519591866.

It is not a de Polignac number, because 6681959157 - 2⁸ = 6681958901 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6681959097 and 6681959106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6681959257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1521282 + ... + 1525667.

It is an arithmetic number, because the mean of its divisors is an integer number (603296100).

Almost surely, 2^6681959157 is an apocalyptic number.

It is an amenable number.

6681959157 is a deficient number, since it is larger than the sum of its proper divisors (2970778443).

6681959157 is a wasteful number, since it uses less digits than its factorization.

6681959157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3047012.

The product of its digits is 4082400, while the sum is 57.

The square root of 6681959157 is about 81743.2514462203. The cubic root of 6681959157 is about 1883.5100372450.

The spelling of 6681959157 in words is "six billion, six hundred eighty-one million, nine hundred fifty-nine thousand, one hundred fifty-seven".