6820727251 has 16 divisors (see below), whose sum is σ = 7589453760. Its totient is φ = 6090215040.

The previous prime is 6820727231. The next prime is 6820727269. The reversal of 6820727251 is 1527270286.

It is a happy number.

It is not a de Polignac number, because 6820727251 - 2¹⁷ = 6820596179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6820727231) 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, 20796 + ... + 118633.

It is an arithmetic number, because the mean of its divisors is an integer number (474340860).

Almost surely, 2^6820727251 is an apocalyptic number.

6820727251 is a deficient number, since it is larger than the sum of its proper divisors (768726509).

6820727251 is a wasteful number, since it uses less digits than its factorization.

6820727251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139566.

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 6820727251 is about 82587.6943073240. The cubic root of 6820727251 is about 1896.4594499597.

The spelling of 6820727251 in words is "six billion, eight hundred twenty million, seven hundred twenty-seven thousand, two hundred fifty-one".