654640080 has 160 divisors (see below), whose sum is σ = 2160183168. Its totient is φ = 163430400.

The previous prime is 654640067. The next prime is 654640081. The reversal of 654640080 is 80046456.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654640081) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1146195 + ... + 1146765.

Almost surely, 2^654640080 is an apocalyptic number.

654640080 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 654640080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1080091584).

654640080 is an abundant number, since it is smaller than the sum of its proper divisors (1505543088).

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

654640080 is a wasteful number, since it uses less digits than its factorization.

654640080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 885 (or 879 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 654640080 is about 25585.9351988549. The cubic root of 654640080 is about 868.2954603045.

The spelling of 654640080 in words is "six hundred fifty-four million, six hundred forty thousand, eighty".