1665224345040 has 80 divisors (see below), whose sum is σ = 5386638768768. Its totient is φ = 424752875008.

The previous prime is 1665224345009. The next prime is 1665224345093. The reversal of 1665224345040 is 405434225661.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 1665224344983 and 1665224345001.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150830019 + ... + 150841058.

Almost surely, 2^{1665224345040} is an apocalyptic number.

1665224345040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1665224345040 is an abundant number, since it is smaller than the sum of its proper divisors (3721414423728).

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

1665224345040 is a wasteful number, since it uses less digits than its factorization.

1665224345040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301671116 (or 301671110 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 42.

The spelling of 1665224345040 in words is "one trillion, six hundred sixty-five billion, two hundred twenty-four million, three hundred forty-five thousand, forty".