7997106820 has 24 divisors (see below), whose sum is σ = 16796064600. Its totient is φ = 3198435072.

The previous prime is 7997106809. The next prime is 7997106829. The reversal of 7997106820 is 286017997.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 97344 + 7997009476 = 312^2 + 89426^2 .

It is not an unprimeable number, because it can be changed into a prime (7997106829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173146 + ... + 214414.

It is an arithmetic number, because the mean of its divisors is an integer number (699836025).

Almost surely, 2^7997106820 is an apocalyptic number.

It is an amenable number.

7997106820 is an abundant number, since it is smaller than the sum of its proper divisors (8798957780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7997106820 is a wasteful number, since it uses less digits than its factorization.

7997106820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50967 (or 50965 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 49.

The square root of 7997106820 is about 89426.5442695847. The cubic root of 7997106820 is about 1999.7588725966.

The spelling of 7997106820 in words is "seven billion, nine hundred ninety-seven million, one hundred six thousand, eight hundred twenty".