654077664 has 144 divisors (see below), whose sum is σ = 1924361712. Its totient is φ = 210622464.

The previous prime is 654077659. The next prime is 654077689. The reversal of 654077664 is 466770456.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1113979 + ... + 1114565.

It is an arithmetic number, because the mean of its divisors is an integer number (13363623).

Almost surely, 2^654077664 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 654077664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (962180856).

654077664 is an abundant number, since it is smaller than the sum of its proper divisors (1270284048).

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

654077664 is a wasteful number, since it uses less digits than its factorization.

654077664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729 (or 718 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 45.

The square root of 654077664 is about 25574.9421113714. The cubic root of 654077664 is about 868.0467316824.

The spelling of 654077664 in words is "six hundred fifty-four million, seventy-seven thousand, six hundred sixty-four".