2066557 has 4 divisors (see below), whose sum is σ = 2094940. Its totient is φ = 2038176.

The previous prime is 2066551. The next prime is 2066563. The reversal of 2066557 is 7556602.

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

It is an interprime number because it is at equal distance from previous prime (2066551) and next prime (2066563).

It can be written as a sum of positive squares in 2 ways, for example, as 1028196 + 1038361 = 1014^2 + 1019^2 .

It is a cyclic number.

It is not a de Polignac number, because 2066557 - 2³ = 2066549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2066551) 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 in 3 ways as a sum of consecutive naturals, for example, 14082 + ... + 14227.

It is an arithmetic number, because the mean of its divisors is an integer number (523735).

2^2066557 is an apocalyptic number.

It is an amenable number.

2066557 is a deficient number, since it is larger than the sum of its proper divisors (28383).

2066557 is an equidigital number, since it uses as much as digits as its factorization.

2066557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28382.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 2066557 is about 1437.5524338263. The cubic root of 2066557 is about 127.3744913839.

The spelling of 2066557 in words is "two million, sixty-six thousand, five hundred fifty-seven".