1665025304576 has 96 divisors (see below), whose sum is σ = 3455855020800. Its totient is φ = 801151057920.

The previous prime is 1665025304491. The next prime is 1665025304623. The reversal of 1665025304576 is 6754035205661.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11291096 + ... + 11437608.

It is an arithmetic number, because the mean of its divisors is an integer number (35998489800).

Almost surely, 2^{1665025304576} is an apocalyptic number.

1665025304576 is a gapful number since it is divisible by the number (16) 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 1665025304576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1727927510400).

1665025304576 is an abundant number, since it is smaller than the sum of its proper divisors (1790829716224).

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

1665025304576 is a wasteful number, since it uses less digits than its factorization.

1665025304576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146745 (or 146725 counting only the distinct ones).

The product of its (nonzero) digits is 4536000, while the sum is 50.

The spelling of 1665025304576 in words is "one trillion, six hundred sixty-five billion, twenty-five million, three hundred four thousand, five hundred seventy-six".