1666552 has 8 divisors (see below), whose sum is σ = 3124800. Its totient is φ = 833272.

The previous prime is 1666541. The next prime is 1666559. The reversal of 1666552 is 2556661.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666559) by changing a digit.

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 as a sum of consecutive naturals, namely, 104152 + ... + 104167.

It is an arithmetic number, because the mean of its divisors is an integer number (390600).

2^1666552 is an apocalyptic number.

It is an amenable number.

1666552 is a deficient number, since it is larger than the sum of its proper divisors (1458248).

1666552 is a wasteful number, since it uses less digits than its factorization.

1666552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208325 (or 208321 counting only the distinct ones).

The product of its digits is 10800, while the sum is 31.

The square root of 1666552 is about 1290.9500377629. The cubic root of 1666552 is about 118.5603910400.

The spelling of 1666552 in words is "one million, six hundred sixty-six thousand, five hundred fifty-two".