287680166 has 4 divisors (see below), whose sum is σ = 431520252. Its totient is φ = 143840082.

The previous prime is 287680157. The next prime is 287680177. The reversal of 287680166 is 661086782.

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

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 71920040 + ... + 71920043.

It is an arithmetic number, because the mean of its divisors is an integer number (107880063).

Almost surely, 2^287680166 is an apocalyptic number.

287680166 is a deficient number, since it is larger than the sum of its proper divisors (143840086).

287680166 is a wasteful number, since it uses less digits than its factorization.

287680166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143840085.

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 287680166 is about 16961.1369312319. The cubic root of 287680166 is about 660.1408989051.

The spelling of 287680166 in words is "two hundred eighty-seven million, six hundred eighty thousand, one hundred sixty-six".