665453000 has 64 divisors (see below), whose sum is σ = 1574866800. Its totient is φ = 263155200.

The previous prime is 665452973. The next prime is 665453011. The reversal of 665453000 is 354566.

It can be written as a sum of positive squares in 8 ways, for example, as 59013124 + 606439876 = 7682^2 + 24626^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85262 + ... + 92738.

Almost surely, 2^665453000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 665453000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (787433400).

665453000 is an abundant number, since it is smaller than the sum of its proper divisors (909413800).

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

665453000 is a wasteful number, since it uses less digits than its factorization.

665453000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7587 (or 7573 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 665453000 is about 25796.3757144293. The cubic root of 665453000 is about 873.0500249721.

The spelling of 665453000 in words is "six hundred sixty-five million, four hundred fifty-three thousand".