665417896 has 96 divisors (see below), whose sum is σ = 1491786720. Its totient is φ = 275808000.

The previous prime is 665417861. The next prime is 665417903. The reversal of 665417896 is 698714566.

665417896 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1501851 + ... + 1502293.

It is an arithmetic number, because the mean of its divisors is an integer number (15539445).

Almost surely, 2^665417896 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 665417896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (745893360).

665417896 is an abundant number, since it is smaller than the sum of its proper divisors (826368824).

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

665417896 is a wasteful number, since it uses less digits than its factorization.

665417896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587 (or 570 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 52.

The square root of 665417896 is about 25795.6952997976. The cubic root of 665417896 is about 873.0346729803.

The spelling of 665417896 in words is "six hundred sixty-five million, four hundred seventeen thousand, eight hundred ninety-six".