665047284 has 24 divisors (see below), whose sum is σ = 1692847968. Its totient is φ = 201529440.

The previous prime is 665047219. The next prime is 665047379. The reversal of 665047284 is 482740566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2518987 + ... + 2519250.

It is an arithmetic number, because the mean of its divisors is an integer number (70535332).

Almost surely, 2^665047284 is an apocalyptic number.

It is an amenable number.

665047284 is an abundant number, since it is smaller than the sum of its proper divisors (1027800684).

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

665047284 is a wasteful number, since it uses less digits than its factorization.

665047284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5038255 (or 5038253 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 42.

The square root of 665047284 is about 25788.5106975955. The cubic root of 665047284 is about 872.8725607115.

The spelling of 665047284 in words is "six hundred sixty-five million, forty-seven thousand, two hundred eighty-four".