2066647 has 4 divisors (see below), whose sum is σ = 2254536. Its totient is φ = 1878760.

The previous prime is 2066641. The next prime is 2066653. The reversal of 2066647 is 7466602.

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 (2066641) and next prime (2066653).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2066647 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 (2066641) 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, 93928 + ... + 93949.

It is an arithmetic number, because the mean of its divisors is an integer number (563634).

2^2066647 is an apocalyptic number.

2066647 is a deficient number, since it is larger than the sum of its proper divisors (187889).

2066647 is a wasteful number, since it uses less digits than its factorization.

2066647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187888.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 2066647 is about 1437.5837366915. The cubic root of 2066647 is about 127.3763404397.

The spelling of 2066647 in words is "two million, sixty-six thousand, six hundred forty-seven".