1066603 has 8 divisors (see below), whose sum is σ = 1139600. Its totient is φ = 995328.

The previous prime is 1066577. The next prime is 1066619. The reversal of 1066603 is 3066601.

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

It is a 12-Lehmer number, since φ(1066603) divides (1066603-1)¹².

It is a cyclic number.

It is not a de Polignac number, because 1066603 - 2¹⁷ = 935531 is a prime.

It is a super-2 number, since 2×1066603² = 2275283919218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1066643) 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, 1003 + ... + 1771.

It is an arithmetic number, because the mean of its divisors is an integer number (142450).

2^1066603 is an apocalyptic number.

1066603 is a deficient number, since it is larger than the sum of its proper divisors (72997).

1066603 is an equidigital number, since it uses as much as digits as its factorization.

1066603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 1066603 is about 1032.7647360362. The cubic root of 1066603 is about 102.1725580967.

The spelling of 1066603 in words is "one million, sixty-six thousand, six hundred three".