665512848 has 640 divisors, whose sum is σ = 2733158400. Its totient is φ = 151165440.

The previous prime is 665512847. The next prime is 665512853. The reversal of 665512848 is 848215566.

It is a super-2 number, since 2×665512848² = 885814701706142208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (665512847) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 35026983 + ... + 35027001.

It is an arithmetic number, because the mean of its divisors is an integer number (4270560).

Almost surely, 2^665512848 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 665512848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1366579200).

665512848 is an abundant number, since it is smaller than the sum of its proper divisors (2067645552).

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

665512848 is a wasteful number, since it uses less digits than its factorization.

665512848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79 (or 55 counting only the distinct ones).

The product of its digits is 460800, while the sum is 45.

The square root of 665512848 is about 25797.5356962637. The cubic root of 665512848 is about 873.0761969840.

It can be divided in two parts, 6655 and 12848, that added together give a triangular number (19503 = T₁₉₇).

The spelling of 665512848 in words is "six hundred sixty-five million, five hundred twelve thousand, eight hundred forty-eight".