1066661 has 8 divisors (see below), whose sum is σ = 1101600. Its totient is φ = 1032400.

The previous prime is 1066651. The next prime is 1066669. The reversal of 1066661 is 1666601.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1066661 is a prime.

It is a super-2 number, since 2×1066661² = 2275531377842, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1066661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066669) 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, 5870 + ... + 6048.

It is an arithmetic number, because the mean of its divisors is an integer number (137700).

2^1066661 is an apocalyptic number.

It is an amenable number.

1066661 is a deficient number, since it is larger than the sum of its proper divisors (34939).

1066661 is a wasteful number, since it uses less digits than its factorization.

1066661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 1066661 is about 1032.7928156218. The cubic root of 1066661 is about 102.1744100513.

The spelling of 1066661 in words is "one million, sixty-six thousand, six hundred sixty-one".