87664827120881 has 4 divisors (see below), whose sum is σ = 91476341343552. Its totient is φ = 83853312898212.

The previous prime is 87664827120853. The next prime is 87664827120901. The reversal of 87664827120881 is 18802172846678.

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 a de Polignac number, because none of the positive numbers 2^k-87664827120881 is a prime.

It is a super-2 number, since 2×87664827120881² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87664827122881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1905757111301 + ... + 1905757111346.

It is an arithmetic number, because the mean of its divisors is an integer number (22869085335888).

Almost surely, 2^{87664827120881} is an apocalyptic number.

It is an amenable number.

87664827120881 is a deficient number, since it is larger than the sum of its proper divisors (3811514222671).

87664827120881 is a wasteful number, since it uses less digits than its factorization.

87664827120881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3811514222670.

The product of its (nonzero) digits is 115605504, while the sum is 68.

The spelling of 87664827120881 in words is "eighty-seven trillion, six hundred sixty-four billion, eight hundred twenty-seven million, one hundred twenty thousand, eight hundred eighty-one".