1665755660 has 12 divisors (see below), whose sum is σ = 3498086928. Its totient is φ = 666302256.

The previous prime is 1665755653. The next prime is 1665755677. The reversal of 1665755660 is 665575661.

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 3 ways as a sum of consecutive naturals, for example, 41643872 + ... + 41643911.

It is an arithmetic number, because the mean of its divisors is an integer number (291507244).

Almost surely, 2^1665755660 is an apocalyptic number.

1665755660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1665755660 is an abundant number, since it is smaller than the sum of its proper divisors (1832331268).

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

1665755660 is a wasteful number, since it uses less digits than its factorization.

1665755660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83287792 (or 83287790 counting only the distinct ones).

The product of its (nonzero) digits is 1134000, while the sum is 47.

The square root of 1665755660 is about 40813.6700138569. The cubic root of 1665755660 is about 1185.4150385574.

The spelling of 1665755660 in words is "one billion, six hundred sixty-five million, seven hundred fifty-five thousand, six hundred sixty".