1664711484480 has 672 divisors, whose sum is σ = 6584129884800. Its totient is φ = 381807820800.

The previous prime is 1664711484463. The next prime is 1664711484509. The reversal of 1664711484480 is 844841174661.

1664711484480 is a `hidden beast` number, since 1 + 6 + 6 + 4 + 71 + 14 + 84 + 480 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 607335910 + ... + 607338650.

Almost surely, 2^{1664711484480} is an apocalyptic number.

1664711484480 is a gapful number since it is divisible by the number (10) 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 1664711484480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3292064942400).

1664711484480 is an abundant number, since it is smaller than the sum of its proper divisors (4919418400320).

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

1664711484480 is a wasteful number, since it uses less digits than its factorization.

1664711484480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3803 (or 3790 counting only the distinct ones).

The product of its (nonzero) digits is 4128768, while the sum is 54.

The spelling of 1664711484480 in words is "one trillion, six hundred sixty-four billion, seven hundred eleven million, four hundred eighty-four thousand, four hundred eighty".