866098 has 4 divisors (see below), whose sum is σ = 1299150. Its totient is φ = 433048.

The previous prime is 866093. The next prime is 866101. The reversal of 866098 is 890668.

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., 613089 + 253009 = 783^2 + 503^2 .

It is not an unprimeable number, because it can be changed into a prime (866093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 216523 + ... + 216526.

2⁸⁶⁶⁰⁹⁸ is an apocalyptic number.

866098 is a deficient number, since it is larger than the sum of its proper divisors (433052).

866098 is a wasteful number, since it uses less digits than its factorization.

866098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433051.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 866098 is about 930.6438631399. The cubic root of 866098 is about 95.3210926411.

The spelling of 866098 in words is "eight hundred sixty-six thousand, ninety-eight".