88666631 has 4 divisors (see below), whose sum is σ = 89087064. Its totient is φ = 88246200.

The previous prime is 88666609. The next prime is 88666637. The reversal of 88666631 is 13666688.

88666631 is nontrivially palindromic in base 14.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 88666631 - 2¹⁰ = 88665607 is a prime.

It is a super-2 number, since 2×88666631² = 15723542905780322, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88666637) 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, 209900 + ... + 210321.

It is an arithmetic number, because the mean of its divisors is an integer number (22271766).

Almost surely, 2^88666631 is an apocalyptic number.

88666631 is a deficient number, since it is larger than the sum of its proper divisors (420433).

88666631 is a wasteful number, since it uses less digits than its factorization.

88666631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420432.

The product of its digits is 248832, while the sum is 44.

The square root of 88666631 is about 9416.2960340040. The cubic root of 88666631 is about 445.9163560490.

The spelling of 88666631 in words is "eighty-eight million, six hundred sixty-six thousand, six hundred thirty-one".