665553096 has 144 divisors (see below), whose sum is σ = 1978376400. Its totient is φ = 202011264.

The previous prime is 665553079. The next prime is 665553101. The reversal of 665553096 is 690355566.

665553096 is a `hidden beast` number, since 6 + 6 + 5 + 553 + 0 + 96 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1009615 + ... + 1010273.

It is an arithmetic number, because the mean of its divisors is an integer number (13738725).

Almost surely, 2^665553096 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 665553096, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (989188200).

665553096 is an abundant number, since it is smaller than the sum of its proper divisors (1312823304).

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

665553096 is a wasteful number, since it uses less digits than its factorization.

665553096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780 (or 760 counting only the distinct ones).

The product of its (nonzero) digits is 729000, while the sum is 45.

The square root of 665553096 is about 25798.3157589793. The cubic root of 665553096 is about 873.0937968759.

The spelling of 665553096 in words is "six hundred sixty-five million, five hundred fifty-three thousand, ninety-six".