665236152 has 320 divisors, whose sum is σ = 2256408000. Its totient is φ = 182891520.

The previous prime is 665236139. The next prime is 665236157. The reversal of 665236152 is 251632566.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665236157) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 9112788 + ... + 9112860.

It is an arithmetic number, because the mean of its divisors is an integer number (7051275).

Almost surely, 2^665236152 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 665236152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1128204000).

665236152 is an abundant number, since it is smaller than the sum of its proper divisors (1591171848).

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

665236152 is a wasteful number, since it uses less digits than its factorization.

665236152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153 (or 126 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 665236152 is about 25792.1723009133. The cubic root of 665236152 is about 872.9551824514.

The spelling of 665236152 in words is "six hundred sixty-five million, two hundred thirty-six thousand, one hundred fifty-two".