7218986080661 has 32 divisors (see below), whose sum is σ = 7573158789120. Its totient is φ = 6872840755200.

The previous prime is 7218986080651. The next prime is 7218986080721. The reversal of 7218986080661 is 1660806898127.

It is a cyclic number.

It is not a de Polignac number, because 7218986080661 - 2⁶ = 7218986080597 is a prime.

It is a super-2 number, since 2×7218986080661² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7218986080594 and 7218986080603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7218986080651) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2799140270 + ... + 2799142848.

It is an arithmetic number, because the mean of its divisors is an integer number (236661212160).

Almost surely, 2^{7218986080661} is an apocalyptic number.

7218986080661 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

7218986080661 is a deficient number, since it is larger than the sum of its proper divisors (354172708459).

7218986080661 is a wasteful number, since it uses less digits than its factorization.

7218986080661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4937.

The product of its (nonzero) digits is 13934592, while the sum is 62.

The spelling of 7218986080661 in words is "seven trillion, two hundred eighteen billion, nine hundred eighty-six million, eighty thousand, six hundred sixty-one".