1665146304 has 84 divisors (see below), whose sum is σ = 4815266976. Its totient is φ = 550115328.

The previous prime is 1665146303. The next prime is 1665146317. The reversal of 1665146304 is 4036415661.

It is a happy number.

1665146304 is a `hidden beast` number, since 1 + 6 + 6 + 5 + 14 + 630 + 4 = 666.

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 (1665146303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52297 + ... + 77879.

Almost surely, 2^1665146304 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 1665146304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2407633488).

1665146304 is an abundant number, since it is smaller than the sum of its proper divisors (3150120672).

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

1665146304 is a wasteful number, since it uses less digits than its factorization.

1665146304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25714 (or 25701 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 1665146304 is about 40806.2042341603. The cubic root of 1665146304 is about 1185.2704739649.

The spelling of 1665146304 in words is "one billion, six hundred sixty-five million, one hundred forty-six thousand, three hundred four".