1664068 has 24 divisors (see below), whose sum is σ = 3366272. Its totient is φ = 705024.

The previous prime is 1664063. The next prime is 1664071. The reversal of 1664068 is 8604661.

It is not an unprimeable number, because it can be changed into a prime (1664063) 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, 2596 + ... + 3172.

2^1664068 is an apocalyptic number.

It is an amenable number.

1664068 is an abundant number, since it is smaller than the sum of its proper divisors (1702204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1664068 is a wasteful number, since it uses less digits than its factorization.

1664068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691 (or 689 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 1664068 is about 1289.9875968396. The cubic root of 1664068 is about 118.5014568949.

The spelling of 1664068 in words is "one million, six hundred sixty-four thousand, sixty-eight".