2001966 has 32 divisors (see below), whose sum is σ = 4250880. Its totient is φ = 627264.

The previous prime is 2001953. The next prime is 2001977. The reversal of 2001966 is 6691002.

2001966 = T₆₈ + T₆₉ + ... + T₂₃₀.

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 15 ways as a sum of consecutive naturals, for example, 12201 + ... + 12363.

It is an arithmetic number, because the mean of its divisors is an integer number (132840).

2^2001966 is an apocalyptic number.

2001966 is an abundant number, since it is smaller than the sum of its proper divisors (2248914).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2001966 is a wasteful number, since it uses less digits than its factorization.

2001966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 2001966 is about 1414.9084776055. The cubic root of 2001966 is about 126.0333748827.

Adding to 2001966 its reverse (6691002), we get a palindrome (8692968).

The spelling of 2001966 in words is "two million, one thousand, nine hundred sixty-six".