1664046 has 24 divisors (see below), whose sum is σ = 3631680. Its totient is φ = 550656.

The previous prime is 1664021. The next prime is 1664053. The reversal of 1664046 is 6404661.

1664046 is a `hidden beast` number, since 16 + 640 + 4 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3235 + ... + 3713.

It is an arithmetic number, because the mean of its divisors is an integer number (151320).

2^1664046 is an apocalyptic number.

1664046 is an abundant number, since it is smaller than the sum of its proper divisors (1967634).

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

1664046 is a wasteful number, since it uses less digits than its factorization.

1664046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680 (or 677 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 1664046 is about 1289.9790695976. The cubic root of 1664046 is about 118.5009346719.

The spelling of 1664046 in words is "one million, six hundred sixty-four thousand, forty-six".