87927579661 has 8 divisors (see below), whose sum is σ = 89843304600. Its totient is φ = 86021362752.

The previous prime is 87927579599. The next prime is 87927579683. The reversal of 87927579661 is 16697572978.

It can be written as a sum of positive squares in 4 ways, for example, as 57326724900 + 30600854761 = 239430^2 + 174931^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87927579661 - 2¹⁷ = 87927448589 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 (87927573661) 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, 2358310 + ... + 2395303.

It is an arithmetic number, because the mean of its divisors is an integer number (11230413075).

Almost surely, 2^87927579661 is an apocalyptic number.

It is an amenable number.

87927579661 is a deficient number, since it is larger than the sum of its proper divisors (1915724939).

87927579661 is a wasteful number, since it uses less digits than its factorization.

87927579661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4754015.

The product of its digits is 80015040, while the sum is 67.

The spelling of 87927579661 in words is "eighty-seven billion, nine hundred twenty-seven million, five hundred seventy-nine thousand, six hundred sixty-one".