5999664 has 60 divisors (see below), whose sum is σ = 17052728. Its totient is φ = 1816320.

The previous prime is 5999663. The next prime is 5999677. The reversal of 5999664 is 4669995.

It is a happy number.

It is a super-2 number, since 2×5999664² = 71991936225792, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5999663) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5292 + ... + 6324.

Almost surely, 2^5999664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5999664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8526364).

5999664 is an abundant number, since it is smaller than the sum of its proper divisors (11053064).

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

5999664 is a wasteful number, since it uses less digits than its factorization.

5999664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1066 (or 1049 counting only the distinct ones).

The product of its digits is 524880, while the sum is 48.

The square root of 5999664 is about 2449.4211561102. The cubic root of 5999664 is about 181.7086672615.

The spelling of 5999664 in words is "five million, nine hundred ninety-nine thousand, six hundred sixty-four".