499961664 has 84 divisors (see below), whose sum is σ = 1436132256. Its totient is φ = 166295808.

The previous prime is 499961659. The next prime is 499961669. The reversal of 499961664 is 466169994.

499961664 is a `hidden beast` number, since 499 + 96 + 1 + 6 + 64 = 666.

It is an interprime number because it is at equal distance from previous prime (499961659) and next prime (499961669).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 499961664.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (499961669) 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, 508117 + ... + 509099.

Almost surely, 2^499961664 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 499961664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (718066128).

499961664 is an abundant number, since it is smaller than the sum of its proper divisors (936170592).

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

499961664 is a wasteful number, since it uses less digits than its factorization.

499961664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1884 (or 1871 counting only the distinct ones).

The product of its digits is 2519424, while the sum is 54.

The square root of 499961664 is about 22359.8225395462. The cubic root of 499961664 is about 793.6802405967.

The spelling of 499961664 in words is "four hundred ninety-nine million, nine hundred sixty-one thousand, six hundred sixty-four".