82668287 has 8 divisors (see below), whose sum is σ = 90707904. Its totient is φ = 74868768.

The previous prime is 82668283. The next prime is 82668293. The reversal of 82668287 is 78286628.

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

It is not a de Polignac number, because 82668287 - 2² = 82668283 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 (82668283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59303 + ... + 60680.

It is an arithmetic number, because the mean of its divisors is an integer number (11338488).

Almost surely, 2^82668287 is an apocalyptic number.

82668287 is a deficient number, since it is larger than the sum of its proper divisors (8039617).

82668287 is a wasteful number, since it uses less digits than its factorization.

82668287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120049.

The product of its digits is 516096, while the sum is 47.

The square root of 82668287 is about 9092.2102373405. The cubic root of 82668287 is about 435.6251846370.

It can be divided in two parts, 82668 and 287, that multiplied together give a triangular number (23725716 = T₆₈₈₈).

The spelling of 82668287 in words is "eighty-two million, six hundred sixty-eight thousand, two hundred eighty-seven".