1966887 has 12 divisors (see below), whose sum is σ = 3059784. Its totient is φ = 1210320.

The previous prime is 1966879. The next prime is 1966889. The reversal of 1966887 is 7886691.

It is a happy number.

It is not a de Polignac number, because 1966887 - 2³ = 1966879 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1966889) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8289 + ... + 8522.

It is an arithmetic number, because the mean of its divisors is an integer number (254982).

2^1966887 is an apocalyptic number.

1966887 is a deficient number, since it is larger than the sum of its proper divisors (1092897).

1966887 is a wasteful number, since it uses less digits than its factorization.

1966887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16830 (or 16827 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 1966887 is about 1402.4574859867. The cubic root of 1966887 is about 125.2929024624.

The spelling of 1966887 in words is "one million, nine hundred sixty-six thousand, eight hundred eighty-seven".