605405664 has 180 divisors, whose sum is σ = 1882027224. Its totient is φ = 190885248.

The previous prime is 605405651. The next prime is 605405687. The reversal of 605405664 is 466504506.

It is a happy number.

605405664 is a `hidden beast` number, since 6 + 0 + 540 + 56 + 64 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 935389 + ... + 936035.

Almost surely, 2^605405664 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 605405664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (941013612).

605405664 is an abundant number, since it is smaller than the sum of its proper divisors (1276621560).

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

605405664 is a wasteful number, since it uses less digits than its factorization.

605405664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707 (or 671 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 605405664 is about 24604.9926640916. The cubic root of 605405664 is about 845.9580483196.

The spelling of 605405664 in words is "six hundred five million, four hundred five thousand, six hundred sixty-four".