675990 has 96 divisors (see below), whose sum is σ = 2134080. Its totient is φ = 145152.

The previous prime is 675979. The next prime is 676007. The reversal of 675990 is 99576.

675990 is a `hidden beast` number, since 67 + 599 + 0 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18252 + ... + 18288.

It is an arithmetic number, because the mean of its divisors is an integer number (22230).

2⁶⁷⁵⁹⁹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 675990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1067040).

675990 is an abundant number, since it is smaller than the sum of its proper divisors (1458090).

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

675990 is a wasteful number, since it uses less digits than its factorization.

675990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 36.

The square root of 675990 is about 822.1861103181. The cubic root of 675990 is about 87.7633967907.

The spelling of 675990 in words is "six hundred seventy-five thousand, nine hundred ninety".