88666821 has 12 divisors (see below), whose sum is σ = 128280672. Its totient is φ = 59015976.

The previous prime is 88666783. The next prime is 88666843. The reversal of 88666821 is 12866688.

It is not a de Polignac number, because 88666821 - 2⁶ = 88666757 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88666871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1791 + ... + 13436.

It is an arithmetic number, because the mean of its divisors is an integer number (10690056).

Almost surely, 2^88666821 is an apocalyptic number.

It is an amenable number.

88666821 is a deficient number, since it is larger than the sum of its proper divisors (39613851).

88666821 is a wasteful number, since it uses less digits than its factorization.

88666821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15880 (or 15877 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The square root of 88666821 is about 9416.3061228913. The cubic root of 88666821 is about 445.9166745606.

The spelling of 88666821 in words is "eighty-eight million, six hundred sixty-six thousand, eight hundred twenty-one".