8758409799661 has 4 divisors (see below), whose sum is σ = 8768023861824. Its totient is φ = 8748795737500.

The previous prime is 8758409799619. The next prime is 8758409799673. The reversal of 8758409799661 is 1669979048578.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8758409799661 - 2⁷ = 8758409799533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8758409799961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4807029715 + ... + 4807031536.

It is an arithmetic number, because the mean of its divisors is an integer number (2192005965456).

Almost surely, 2^{8758409799661} is an apocalyptic number.

It is an amenable number.

8758409799661 is a deficient number, since it is larger than the sum of its proper divisors (9614062163).

8758409799661 is an equidigital number, since it uses as much as digits as its factorization.

8758409799661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9614062162.

The product of its (nonzero) digits is 1646023680, while the sum is 79.

The spelling of 8758409799661 in words is "eight trillion, seven hundred fifty-eight billion, four hundred nine million, seven hundred ninety-nine thousand, six hundred sixty-one".