1665996 has 24 divisors (see below), whose sum is σ = 4092480. Its totient is φ = 526032.

The previous prime is 1665973. The next prime is 1665997. The reversal of 1665996 is 6995661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3426 + ... + 3881.

It is an arithmetic number, because the mean of its divisors is an integer number (170520).

2^1665996 is an apocalyptic number.

It is an amenable number.

1665996 is an abundant number, since it is smaller than the sum of its proper divisors (2426484).

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

1665996 is a wasteful number, since it uses less digits than its factorization.

1665996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7333 (or 7331 counting only the distinct ones).

The product of its digits is 87480, while the sum is 42.

The square root of 1665996 is about 1290.7346745168. The cubic root of 1665996 is about 118.5472047509.

The spelling of 1665996 in words is "one million, six hundred sixty-five thousand, nine hundred ninety-six".