866945290 has 16 divisors (see below), whose sum is σ = 1561500360. Its totient is φ = 346556160.

The previous prime is 866945273. The next prime is 866945297. The reversal of 866945290 is 92549668.

It can be written as a sum of positive squares in 4 ways, for example, as 852815209 + 14130081 = 29203^2 + 3759^2 .

It is not an unprimeable number, because it can be changed into a prime (866945297) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 10851 + ... + 43030.

Almost surely, 2^866945290 is an apocalyptic number.

866945290 is a deficient number, since it is larger than the sum of its proper divisors (694555070).

866945290 is a wasteful number, since it uses less digits than its factorization.

866945290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55497.

The product of its (nonzero) digits is 933120, while the sum is 49.

The square root of 866945290 is about 29443.9346895078. The cubic root of 866945290 is about 953.5216621704.

The spelling of 866945290 in words is "eight hundred sixty-six million, nine hundred forty-five thousand, two hundred ninety".