1668057 has 8 divisors (see below), whose sum is σ = 2354976. Its totient is φ = 1046592.

The previous prime is 1668053. The next prime is 1668061. The reversal of 1668057 is 7508661.

It is an interprime number because it is at equal distance from previous prime (1668053) and next prime (1668061).

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

It is not a de Polignac number, because 1668057 - 2² = 1668053 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1668053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16303 + ... + 16404.

It is an arithmetic number, because the mean of its divisors is an integer number (294372).

2^1668057 is an apocalyptic number.

1668057 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1668057 is a deficient number, since it is larger than the sum of its proper divisors (686919).

1668057 is a wasteful number, since it uses less digits than its factorization.

1668057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32727.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 1668057 is about 1291.5328102685. The cubic root of 1668057 is about 118.5960694353.

The spelling of 1668057 in words is "one million, six hundred sixty-eight thousand, fifty-seven".