7120786840661 has 16 divisors (see below), whose sum is σ = 7873310168640. Its totient is φ = 6398240234880.

The previous prime is 7120786840633. The next prime is 7120786840663. The reversal of 7120786840661 is 1660486870217.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-7120786840661 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7120786840597 and 7120786840606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7120786840663) 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, 14842691 + ... + 15314928.

It is an arithmetic number, because the mean of its divisors is an integer number (492081885540).

Almost surely, 2^{7120786840661} is an apocalyptic number.

It is an amenable number.

7120786840661 is a deficient number, since it is larger than the sum of its proper divisors (752523327979).

7120786840661 is a wasteful number, since it uses less digits than its factorization.

7120786840661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30158116.

The product of its (nonzero) digits is 5419008, while the sum is 56.

The spelling of 7120786840661 in words is "seven trillion, one hundred twenty billion, seven hundred eighty-six million, eight hundred forty thousand, six hundred sixty-one".