666853152 has 288 divisors, whose sum is σ = 2233889280. Its totient is φ = 172892160.

The previous prime is 666853139. The next prime is 666853157. The reversal of 666853152 is 251358666.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (666853157) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2478874 + ... + 2479142.

It is an arithmetic number, because the mean of its divisors is an integer number (7756560).

Almost surely, 2^666853152 is an apocalyptic number.

666853152 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is a pronic number, being equal to 25823×25824.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666853152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1116944640).

666853152 is an abundant number, since it is smaller than the sum of its proper divisors (1567036128).

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

666853152 is a wasteful number, since it uses less digits than its factorization.

666853152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344 (or 329 counting only the distinct ones).

The product of its digits is 259200, while the sum is 42.

The square root of 666853152 is about 25823.4999951594. The cubic root of 666853152 is about 873.6619121145.

The spelling of 666853152 in words is "six hundred sixty-six million, eight hundred fifty-three thousand, one hundred fifty-two".