1665101120 has 56 divisors (see below), whose sum is σ = 4101769800. Its totient is φ = 643069952.

The previous prime is 1665101117. The next prime is 1665101173. The reversal of 1665101120 is 211015661.

It can be written as a sum of positive squares in 4 ways, for example, as 225961024 + 1439140096 = 15032^2 + 37936^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80435 + ... + 98994.

Almost surely, 2^1665101120 is an apocalyptic number.

1665101120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1665101120 is an abundant number, since it is smaller than the sum of its proper divisors (2436668680).

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

1665101120 is a wasteful number, since it uses less digits than its factorization.

1665101120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179475 (or 179465 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 1665101120 is about 40805.6505891035. The cubic root of 1665101120 is about 1185.2597530360.

Adding to 1665101120 its reverse (211015661), we get a palindrome (1876116781).

The spelling of 1665101120 in words is "one billion, six hundred sixty-five million, one hundred one thousand, one hundred twenty".