87666727 has 4 divisors (see below), whose sum is σ = 90036136. Its totient is φ = 85297320.

The previous prime is 87666721. The next prime is 87666751. The reversal of 87666727 is 72766678.

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 87666727 - 2¹⁹ = 87142439 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 (87666721) 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 3 ways as a sum of consecutive naturals, for example, 1184649 + ... + 1184722.

It is an arithmetic number, because the mean of its divisors is an integer number (22509034).

Almost surely, 2^87666727 is an apocalyptic number.

87666727 is a deficient number, since it is larger than the sum of its proper divisors (2369409).

87666727 is a wasteful number, since it uses less digits than its factorization.

87666727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2369408.

The product of its digits is 1185408, while the sum is 49.

The square root of 87666727 is about 9363.0511586769. The cubic root of 87666727 is about 444.2337982880.

Subtracting from 87666727 its sum of digits (49), we obtain a palindrome (87666678).

The spelling of 87666727 in words is "eighty-seven million, six hundred sixty-six thousand, seven hundred twenty-seven".