866121362 has 4 divisors (see below), whose sum is σ = 1299182046. Its totient is φ = 433060680.

The previous prime is 866121343. The next prime is 866121367. The reversal of 866121362 is 263121668.

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

It can be written as a sum of positive squares in only one way, i.e., 847450321 + 18671041 = 29111^2 + 4321^2 .

It is not an unprimeable number, because it can be changed into a prime (866121367) 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 as a sum of consecutive naturals, namely, 216530339 + ... + 216530342.

Almost surely, 2^866121362 is an apocalyptic number.

866121362 is a deficient number, since it is larger than the sum of its proper divisors (433060684).

866121362 is a wasteful number, since it uses less digits than its factorization.

866121362 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433060683.

The product of its digits is 20736, while the sum is 35.

The square root of 866121362 is about 29429.9398912060. The cubic root of 866121362 is about 953.2194969241.

The spelling of 866121362 in words is "eight hundred sixty-six million, one hundred twenty-one thousand, three hundred sixty-two".