1666968 has 16 divisors (see below), whose sum is σ = 4167480. Its totient is φ = 555648.

The previous prime is 1666943. The next prime is 1666991. The reversal of 1666968 is 8696661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34705 + ... + 34752.

2^1666968 is an apocalyptic number.

It is an amenable number.

1666968 is an abundant number, since it is smaller than the sum of its proper divisors (2500512).

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

1666968 is a wasteful number, since it uses less digits than its factorization.

1666968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69466 (or 69462 counting only the distinct ones).

The product of its digits is 93312, while the sum is 42.

The square root of 1666968 is about 1291.1111493593. Note that the first 4 decimals coincide. The cubic root of 1666968 is about 118.5702551225.

The spelling of 1666968 in words is "one million, six hundred sixty-six thousand, nine hundred sixty-eight".