664219854480 has 320 divisors, whose sum is σ = 2593194024960. Its totient is φ = 136883755008.

The previous prime is 664219854443. The next prime is 664219854527. The reversal of 664219854480 is 84458912466.

It is a self number, because there is not a number n which added to its sum of digits gives 664219854480.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 585481 + ... + 1292759.

It is an arithmetic number, because the mean of its divisors is an integer number (8103731328).

Almost surely, 2^664219854480 is an apocalyptic number.

664219854480 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 664219854480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1296597012480).

664219854480 is an abundant number, since it is smaller than the sum of its proper divisors (1928974170480).

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

664219854480 is a wasteful number, since it uses less digits than its factorization.

664219854480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707358 (or 707352 counting only the distinct ones).

The product of its (nonzero) digits is 13271040, while the sum is 57.

The spelling of 664219854480 in words is "six hundred sixty-four billion, two hundred nineteen million, eight hundred fifty-four thousand, four hundred eighty".