1665934572960 has 384 divisors, whose sum is σ = 6826273574400. Its totient is φ = 371497328640.

The previous prime is 1665934572959. The next prime is 1665934573033. The reversal of 1665934572960 is 692754395661.

1665934572960 is a `hidden beast` number, since 1 + 6 + 6 + 5 + 93 + 457 + 2 + 96 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

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, 568006 + ... + 1911674.

It is an arithmetic number, because the mean of its divisors is an integer number (17776754100).

Almost surely, 2^{1665934572960} is an apocalyptic number.

1665934572960 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 1665934572960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3413136787200).

1665934572960 is an abundant number, since it is smaller than the sum of its proper divisors (5160339001440).

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

1665934572960 is a wasteful number, since it uses less digits than its factorization.

1665934572960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343741 (or 1343727 counting only the distinct ones).

The product of its (nonzero) digits is 73483200, while the sum is 63.

The spelling of 1665934572960 in words is "one trillion, six hundred sixty-five billion, nine hundred thirty-four million, five hundred seventy-two thousand, nine hundred sixty".