1601966 has 8 divisors (see below), whose sum is σ = 2529480. Its totient is φ = 758808.

The previous prime is 1601953. The next prime is 1601969. The reversal of 1601966 is 6691061.

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

It is a super-3 number, since 3×1601966³ = 12333352321043090088, which contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21041 + ... + 21116.

It is an arithmetic number, because the mean of its divisors is an integer number (316185).

2^1601966 is an apocalyptic number.

1601966 is a deficient number, since it is larger than the sum of its proper divisors (927514).

1601966 is a wasteful number, since it uses less digits than its factorization.

1601966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42178.

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

The square root of 1601966 is about 1265.6879552244. The cubic root of 1601966 is about 117.0085950780.

The spelling of 1601966 in words is "one million, six hundred one thousand, nine hundred sixty-six".