665480000 has 140 divisors (see below), whose sum is σ = 1675863552. Its totient is φ = 262080000.

The previous prime is 665479993. The next prime is 665480009. The reversal of 665480000 is 84566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665480009) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5079935 + ... + 5080065.

Almost surely, 2^665480000 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 665480000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (837931776).

665480000 is an abundant number, since it is smaller than the sum of its proper divisors (1010383552).

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

665480000 is a wasteful number, since it uses less digits than its factorization.

665480000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290 (or 265 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 665480000 is about 25796.8990384503. The cubic root of 665480000 is about 873.0618324836.

The spelling of 665480000 in words is "six hundred sixty-five million, four hundred eighty thousand".