87771566 has 8 divisors (see below), whose sum is σ = 132223104. Its totient is φ = 43697200.

The previous prime is 87771559. The next prime is 87771581. The reversal of 87771566 is 66517778.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 87771566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93710 + ... + 94641.

It is an arithmetic number, because the mean of its divisors is an integer number (16527888).

Almost surely, 2^87771566 is an apocalyptic number.

87771566 is a deficient number, since it is larger than the sum of its proper divisors (44451538).

87771566 is a wasteful number, since it uses less digits than its factorization.

87771566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188586.

The product of its digits is 493920, while the sum is 47.

The square root of 87771566 is about 9368.6480348020. The cubic root of 87771566 is about 444.4108113762.

The spelling of 87771566 in words is "eighty-seven million, seven hundred seventy-one thousand, five hundred sixty-six".