6711921851 has 4 divisors (see below), whose sum is σ = 6875627304. Its totient is φ = 6548216400.

The previous prime is 6711921761. The next prime is 6711921857. The reversal of 6711921851 is 1581291176.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6711921851 - 2¹⁴ = 6711905467 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 163705411 = 6711921851 / (6 + 7 + 1 + 1 + 9 + 2 + 1 + 8 + 5 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6711921799 and 6711921808.

It is not an unprimeable number, because it can be changed into a prime (6711921857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81852665 + ... + 81852746.

It is an arithmetic number, because the mean of its divisors is an integer number (1718906826).

Almost surely, 2^6711921851 is an apocalyptic number.

6711921851 is a deficient number, since it is larger than the sum of its proper divisors (163705453).

6711921851 is a wasteful number, since it uses less digits than its factorization.

6711921851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163705452.

The product of its digits is 30240, while the sum is 41.

The square root of 6711921851 is about 81926.3196475955. The cubic root of 6711921851 is about 1886.3211334767.

The spelling of 6711921851 in words is "six billion, seven hundred eleven million, nine hundred twenty-one thousand, eight hundred fifty-one".