1666098 has 36 divisors (see below), whose sum is σ = 4201470. Its totient is φ = 475776.

The previous prime is 1666081. The next prime is 1666111. The reversal of 1666098 is 8906661.

It can be written as a sum of positive squares in only one way, i.e., 1432809 + 233289 = 1197^2 + 483^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 63 + ... + 1826.

2^1666098 is an apocalyptic number.

1666098 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1666098, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2100735).

1666098 is an abundant number, since it is smaller than the sum of its proper divisors (2535372).

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

1666098 is a wasteful number, since it uses less digits than its factorization.

1666098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1911 (or 1901 counting only the distinct ones).

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

The square root of 1666098 is about 1290.7741862929. The cubic root of 1666098 is about 118.5496240380.

The spelling of 1666098 in words is "one million, six hundred sixty-six thousand, ninety-eight".