6820640375 has 8 divisors (see below), whose sum is σ = 8512159344. Its totient is φ = 5456512200.

The previous prime is 6820640371. The next prime is 6820640377. The reversal of 6820640375 is 5730460286.

It is a happy number.

It is not a de Polignac number, because 6820640375 - 2² = 6820640371 is a prime.

It is a super-2 number, since 2×6820640375² = 93042270250160281250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6820640371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27282437 + ... + 27282686.

It is an arithmetic number, because the mean of its divisors is an integer number (1064019918).

Almost surely, 2^6820640375 is an apocalyptic number.

6820640375 is a deficient number, since it is larger than the sum of its proper divisors (1691518969).

6820640375 is an equidigital number, since it uses as much as digits as its factorization.

6820640375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54565138 (or 54565128 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 41.

The square root of 6820640375 is about 82587.1683435145. The cubic root of 6820640375 is about 1896.4513981540.

The spelling of 6820640375 in words is "six billion, eight hundred twenty million, six hundred forty thousand, three hundred seventy-five".