1664486 has 8 divisors (see below), whose sum is σ = 2516184. Its totient is φ = 825760.

The previous prime is 1664461. The next prime is 1664501. The reversal of 1664486 is 6844661.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2915 + ... + 3438.

It is an arithmetic number, because the mean of its divisors is an integer number (314523).

2^1664486 is an apocalyptic number.

1664486 is a deficient number, since it is larger than the sum of its proper divisors (851698).

1664486 is a wasteful number, since it uses less digits than its factorization.

1664486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6486.

The product of its digits is 27648, while the sum is 35.

The square root of 1664486 is about 1290.1496037282. The cubic root of 1664486 is about 118.5113782567.

The spelling of 1664486 in words is "one million, six hundred sixty-four thousand, four hundred eighty-six".