665083146 has 128 divisors (see below), whose sum is σ = 1757306880. Its totient is φ = 162819072.

The previous prime is 665083127. The next prime is 665083147. The reversal of 665083146 is 641380566.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (665083147) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 732825 + ... + 733731.

It is an arithmetic number, because the mean of its divisors is an integer number (13728960).

Almost surely, 2^665083146 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 665083146, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (878653440).

665083146 is an abundant number, since it is smaller than the sum of its proper divisors (1092223734).

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

665083146 is a wasteful number, since it uses less digits than its factorization.

665083146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028.

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 665083146 is about 25789.2059978589. The cubic root of 665083146 is about 872.8882500186. Note that the first 3 decimals are identical.

Subtracting from 665083146 its product of nonzero digits (103680), we obtain a palindrome (664979466).

The spelling of 665083146 in words is "six hundred sixty-five million, eighty-three thousand, one hundred forty-six".