1098666 has 24 divisors (see below), whose sum is σ = 2418624. Its totient is φ = 360360.

The previous prime is 1098649. The next prime is 1098667. The reversal of 1098666 is 6668901.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1098666.

It is not an unprimeable number, because it can be changed into a prime (1098667) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 751 + ... + 1661.

It is an arithmetic number, because the mean of its divisors is an integer number (100776).

2^1098666 is an apocalyptic number.

1098666 is an abundant number, since it is smaller than the sum of its proper divisors (1319958).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1098666 is a wasteful number, since it uses less digits than its factorization.

1098666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986 (or 983 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 1098666 is about 1048.1726956948. The cubic root of 1098666 is about 103.1862655239.

It can be divided in two parts, 1098 and 666, that added together give a square (1764 = 42²).

The spelling of 1098666 in words is "one million, ninety-eight thousand, six hundred sixty-six".