866944153 has 4 divisors (see below), whose sum is σ = 868825188. Its totient is φ = 865063120.

The previous prime is 866944123. The next prime is 866944163. The reversal of 866944153 is 351449668.

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

It can be written as a sum of positive squares in 2 ways, for example, as 488719449 + 378224704 = 22107^2 + 19448^2 .

It is a cyclic number.

It is not a de Polignac number, because 866944153 - 2⁹ = 866943641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (866944123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 939826 + ... + 940747.

It is an arithmetic number, because the mean of its divisors is an integer number (217206297).

Almost surely, 2^866944153 is an apocalyptic number.

It is an amenable number.

866944153 is a deficient number, since it is larger than the sum of its proper divisors (1881035).

866944153 is a wasteful number, since it uses less digits than its factorization.

866944153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1881034.

The product of its digits is 622080, while the sum is 46.

The square root of 866944153 is about 29443.9153816200. The cubic root of 866944153 is about 953.5212453219.

The spelling of 866944153 in words is "eight hundred sixty-six million, nine hundred forty-four thousand, one hundred fifty-three".