1966601 has 8 divisors (see below), whose sum is σ = 2420544. Its totient is φ = 1555920.

The previous prime is 1966597. The next prime is 1966603. The reversal of 1966601 is 1066691.

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 1966601 - 2² = 1966597 is a prime.

It is a Curzon number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (1966603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10715 + ... + 10896.

It is an arithmetic number, because the mean of its divisors is an integer number (302568).

2^1966601 is an apocalyptic number.

It is an amenable number.

1966601 is a deficient number, since it is larger than the sum of its proper divisors (453943).

1966601 is a wasteful number, since it uses less digits than its factorization.

1966601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21631.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 1966601 is about 1402.3555184047. The cubic root of 1966601 is about 125.2868293281.

The spelling of 1966601 in words is "one million, nine hundred sixty-six thousand, six hundred one".