1666916 has 12 divisors (see below), whose sum is σ = 2928240. Its totient is φ = 830280.

The previous prime is 1666913. The next prime is 1666919. The reversal of 1666916 is 6196661.

It is an interprime number because it is at equal distance from previous prime (1666913) and next prime (1666919).

It is not an unprimeable number, because it can be changed into a prime (1666913) 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, 695 + ... + 1953.

It is an arithmetic number, because the mean of its divisors is an integer number (244020).

2^1666916 is an apocalyptic number.

It is an amenable number.

1666916 is a deficient number, since it is larger than the sum of its proper divisors (1261324).

1666916 is a wasteful number, since it uses less digits than its factorization.

1666916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1594 (or 1592 counting only the distinct ones).

The product of its digits is 11664, while the sum is 35.

The square root of 1666916 is about 1291.0910115093. The cubic root of 1666916 is about 118.5690222020.

The spelling of 1666916 in words is "one million, six hundred sixty-six thousand, nine hundred sixteen".