2053666 has 4 divisors (see below), whose sum is σ = 3080502. Its totient is φ = 1026832.

The previous prime is 2053661. The next prime is 2053673. The reversal of 2053666 is 6663502.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1782225 + 271441 = 1335^2 + 521^2 .

It is not an unprimeable number, because it can be changed into a prime (2053661) 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 as a sum of consecutive naturals, namely, 513415 + ... + 513418.

2^2053666 is an apocalyptic number.

2053666 is a deficient number, since it is larger than the sum of its proper divisors (1026836).

2053666 is a wasteful number, since it uses less digits than its factorization.

2053666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1026835.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 2053666 is about 1433.0617572177. The cubic root of 2053666 is about 127.1090884884.

It can be divided in two parts, 20536 and 66, that added together give a palindrome (20602).

The spelling of 2053666 in words is "two million, fifty-three thousand, six hundred sixty-six".