88666591 has 8 divisors (see below), whose sum is σ = 95765600. Its totient is φ = 81607392.

The previous prime is 88666583. The next prime is 88666607. The reversal of 88666591 is 19566688.

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 88666591 - 2³ = 88666583 is a prime.

It is a super-2 number, since 2×88666591² = 15723528719122562, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88666531) 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, 5235 + ... + 14308.

It is an arithmetic number, because the mean of its divisors is an integer number (11970700).

Almost surely, 2^88666591 is an apocalyptic number.

88666591 is a deficient number, since it is larger than the sum of its proper divisors (7099009).

88666591 is a wasteful number, since it uses less digits than its factorization.

88666591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19905.

The product of its digits is 622080, while the sum is 49.

The square root of 88666591 is about 9416.2939100264. The cubic root of 88666591 is about 445.9162889939.

The spelling of 88666591 in words is "eighty-eight million, six hundred sixty-six thousand, five hundred ninety-one".