1663001 has 8 divisors (see below), whose sum is σ = 1741824. Its totient is φ = 1586080.

The previous prime is 1662979. The next prime is 1663009. The reversal of 1663001 is 1003661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1663001 - 2¹⁰ = 1661977 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663009) 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, 1496 + ... + 2358.

It is an arithmetic number, because the mean of its divisors is an integer number (217728).

2^1663001 is an apocalyptic number.

It is an amenable number.

1663001 is a deficient number, since it is larger than the sum of its proper divisors (78823).

1663001 is an equidigital number, since it uses as much as digits as its factorization.

1663001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1663001 is about 1289.5739606552. The cubic root of 1663001 is about 118.4761237777.

Adding to 1663001 its reverse (1003661), we get a palindrome (2666662).

It can be divided in two parts, 16 and 63001, that multiplied together give a square (1008016 = 1004²).

The spelling of 1663001 in words is "one million, six hundred sixty-three thousand, one".