1664086 has 8 divisors (see below), whose sum is σ = 2507544. Its totient is φ = 828240.

The previous prime is 1664083. The next prime is 1664101. The reversal of 1664086 is 6804661.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1320 + ... + 2251.

It is an arithmetic number, because the mean of its divisors is an integer number (313443).

2^1664086 is an apocalyptic number.

1664086 is a deficient number, since it is larger than the sum of its proper divisors (843458).

1664086 is a wasteful number, since it uses less digits than its factorization.

1664086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3806.

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

The square root of 1664086 is about 1289.9945736320. The cubic root of 1664086 is about 118.5018841648.

The spelling of 1664086 in words is "one million, six hundred sixty-four thousand, eighty-six".