1663692 has 12 divisors (see below), whose sum is σ = 3881976. Its totient is φ = 554560.

The previous prime is 1663687. The next prime is 1663693. The reversal of 1663692 is 2963661.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-4 number, since 4×1663692⁴ (a number of 26 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (1663693) 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, 69309 + ... + 69332.

It is an arithmetic number, because the mean of its divisors is an integer number (323498).

2^1663692 is an apocalyptic number.

1663692 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1663692 is an abundant number, since it is smaller than the sum of its proper divisors (2218284).

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

1663692 is a wasteful number, since it uses less digits than its factorization.

1663692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138648 (or 138646 counting only the distinct ones).

The product of its digits is 11664, while the sum is 33.

The square root of 1663692 is about 1289.8418507709. The cubic root of 1663692 is about 118.4925309968.

The spelling of 1663692 in words is "one million, six hundred sixty-three thousand, six hundred ninety-two".