87666893 has 4 divisors (see below), whose sum is σ = 92280960. Its totient is φ = 83052828.

The previous prime is 87666881. The next prime is 87666907. The reversal of 87666893 is 39866678.

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.

It is a cyclic number.

It is not a de Polignac number, because 87666893 - 2⁴ = 87666877 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 (87666793) 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, 2307005 + ... + 2307042.

It is an arithmetic number, because the mean of its divisors is an integer number (23070240).

Almost surely, 2^87666893 is an apocalyptic number.

It is an amenable number.

87666893 is a deficient number, since it is larger than the sum of its proper divisors (4614067).

87666893 is a wasteful number, since it uses less digits than its factorization.

87666893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4614066.

The product of its digits is 2612736, while the sum is 53.

The square root of 87666893 is about 9363.0600233043. The cubic root of 87666893 is about 444.2340786786.

The spelling of 87666893 in words is "eighty-seven million, six hundred sixty-six thousand, eight hundred ninety-three".