6780906121 has 16 divisors (see below), whose sum is σ = 7859269440. Its totient is φ = 5791020480.

The previous prime is 6780906089. The next prime is 6780906131. The reversal of 6780906121 is 1216090876.

It is a cyclic number.

It is not a de Polignac number, because 6780906121 - 2⁵ = 6780906089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6780906131) 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, 275451 + ... + 299056.

It is an arithmetic number, because the mean of its divisors is an integer number (491204340).

Almost surely, 2^6780906121 is an apocalyptic number.

It is an amenable number.

6780906121 is a deficient number, since it is larger than the sum of its proper divisors (1078363319).

6780906121 is a wasteful number, since it uses less digits than its factorization.

6780906121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574584.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 6780906121 is about 82346.2574802280. The cubic root of 6780906121 is about 1892.7615743176.

Adding to 6780906121 its reverse (1216090876), we get a palindrome (7996996997).

The spelling of 6780906121 in words is "six billion, seven hundred eighty million, nine hundred six thousand, one hundred twenty-one".