1966011 has 4 divisors (see below), whose sum is σ = 2621352. Its totient is φ = 1310672.

The previous prime is 1966009. The next prime is 1966031. The reversal of 1966011 is 1106691.

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

It is a cyclic number.

It is not a de Polignac number, because 1966011 - 2¹ = 1966009 is a prime.

It is a D-number.

1966011 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1966031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327666 + ... + 327671.

It is an arithmetic number, because the mean of its divisors is an integer number (655338).

2^1966011 is an apocalyptic number.

1966011 is a deficient number, since it is larger than the sum of its proper divisors (655341).

1966011 is an equidigital number, since it uses as much as digits as its factorization.

1966011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655340.

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 1966011 is about 1402.1451422731. The cubic root of 1966011 is about 125.2742989736.

The spelling of 1966011 in words is "one million, nine hundred sixty-six thousand, eleven".