1660055 has 4 divisors (see below), whose sum is σ = 1992072. Its totient is φ = 1328040.

The previous prime is 1660039. The next prime is 1660063. The reversal of 1660055 is 5500661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5500661 = 1103 ⋅4987.

It is not a de Polignac number, because 1660055 - 2⁴ = 1660039 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1660055.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 166001 + ... + 166010.

It is an arithmetic number, because the mean of its divisors is an integer number (498018).

2^1660055 is an apocalyptic number.

1660055 is a deficient number, since it is larger than the sum of its proper divisors (332017).

1660055 is an equidigital number, since it uses as much as digits as its factorization.

1660055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332016.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 1660055 is about 1288.4312166352. The cubic root of 1660055 is about 118.4061224235.

Subtracting 1660055 from its reverse (5500661), we obtain a triangular number (3840606 = T₂₇₇₁).

The spelling of 1660055 in words is "one million, six hundred sixty thousand, fifty-five".