866378487 has 8 divisors (see below), whose sum is σ = 1244030704. Its totient is φ = 533155968.

The previous prime is 866378477. The next prime is 866378501. The reversal of 866378487 is 784873668.

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

It is not a de Polignac number, because 866378487 - 2¹¹ = 866376439 is a prime.

It is a super-2 number, since 2×866378487² = 1501223365472818338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866378477) 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, 11107378 + ... + 11107455.

It is an arithmetic number, because the mean of its divisors is an integer number (155503838).

Almost surely, 2^866378487 is an apocalyptic number.

866378487 is a deficient number, since it is larger than the sum of its proper divisors (377652217).

866378487 is a wasteful number, since it uses less digits than its factorization.

866378487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22214849.

The product of its digits is 10838016, while the sum is 57.

The square root of 866378487 is about 29434.3079925450. The cubic root of 866378487 is about 953.3138148508.

The spelling of 866378487 in words is "eight hundred sixty-six million, three hundred seventy-eight thousand, four hundred eighty-seven".