88666123421 has 4 divisors (see below), whose sum is σ = 88666892352. Its totient is φ = 88665354492.

The previous prime is 88666123411. The next prime is 88666123433. The reversal of 88666123421 is 12432166688.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 88666123421 - 2¹⁰ = 88666122397 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 (88666123411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172571 + ... + 455096.

It is an arithmetic number, because the mean of its divisors is an integer number (22166723088).

Almost surely, 2^88666123421 is an apocalyptic number.

It is an amenable number.

88666123421 is a deficient number, since it is larger than the sum of its proper divisors (768931).

88666123421 is a wasteful number, since it uses less digits than its factorization.

88666123421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768930.

The product of its digits is 663552, while the sum is 47.

The spelling of 88666123421 in words is "eighty-eight billion, six hundred sixty-six million, one hundred twenty-three thousand, four hundred twenty-one".