1665236160 has 168 divisors, whose sum is σ = 6546043296. Its totient is φ = 380620800.

The previous prime is 1665236149. The next prime is 1665236213. The reversal of 1665236160 is 616325661.

1665236160 is a `hidden beast` number, since 16 + 6 + 5 + 23 + 616 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (168).

It is a super-2 number, since 2×1665236160² = 5546022937143091200, which contains 22 as substring.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21141 + ... + 61460.

Almost surely, 2^1665236160 is an apocalyptic number.

1665236160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1665236160 is an abundant number, since it is smaller than the sum of its proper divisors (4880807136).

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

1665236160 is a wasteful number, since it uses less digits than its factorization.

1665236160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82631 (or 82618 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 1665236160 is about 40807.3052283534. The cubic root of 1665236160 is about 1185.2917937628.

The spelling of 1665236160 in words is "one billion, six hundred sixty-five million, two hundred thirty-six thousand, one hundred sixty".