7158666158661 has 32 divisors (see below), whose sum is σ = 10130018371200. Its totient is φ = 4481200486400.

The previous prime is 7158666158647. The next prime is 7158666158687. The reversal of 7158666158661 is 1668516668517.

It is a cyclic number.

It is not a de Polignac number, because 7158666158661 - 2¹⁵ = 7158666125893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7158666158592 and 7158666158601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7158666157661) 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, 70791586 + ... + 70892636.

It is an arithmetic number, because the mean of its divisors is an integer number (316563074100).

Almost surely, 2^{7158666158661} is an apocalyptic number.

It is an amenable number.

7158666158661 is a deficient number, since it is larger than the sum of its proper divisors (2971352212539).

7158666158661 is a wasteful number, since it uses less digits than its factorization.

7158666158661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104309.

The product of its digits is 87091200, while the sum is 66.

The spelling of 7158666158661 in words is "seven trillion, one hundred fifty-eight billion, six hundred sixty-six million, one hundred fifty-eight thousand, six hundred sixty-one".