87258566 has 4 divisors (see below), whose sum is σ = 130887852. Its totient is φ = 43629282.

The previous prime is 87258557. The next prime is 87258641. The reversal of 87258566 is 66585278.

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

It is a super-2 number, since 2×87258566² = 15228114680752712, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 87258566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21814640 + ... + 21814643.

It is an arithmetic number, because the mean of its divisors is an integer number (32721963).

Almost surely, 2^87258566 is an apocalyptic number.

87258566 is a deficient number, since it is larger than the sum of its proper divisors (43629286).

87258566 is a wasteful number, since it uses less digits than its factorization.

87258566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43629285.

The product of its digits is 806400, while the sum is 47.

The square root of 87258566 is about 9341.2293623484. The cubic root of 87258566 is about 443.5433005203.

The spelling of 87258566 in words is "eighty-seven million, two hundred fifty-eight thousand, five hundred sixty-six".