1665042645654 has 12 divisors (see below), whose sum is σ = 3607592398956. Its totient is φ = 555014215212.

The previous prime is 1665042645641. The next prime is 1665042645667. The reversal of 1665042645654 is 4565462405661.

1665042645654 is a `hidden beast` number, since 1 + 6 + 6 + 50 + 4 + 26 + 4 + 565 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (1665042645641) and next prime (1665042645667).

It is a self number, because there is not a number n which added to its sum of digits gives 1665042645654.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 46251184584 + ... + 46251184619.

It is an arithmetic number, because the mean of its divisors is an integer number (300632699913).

Almost surely, 2^{1665042645654} is an apocalyptic number.

1665042645654 is an abundant number, since it is smaller than the sum of its proper divisors (1942549753302).

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

1665042645654 is a wasteful number, since it uses less digits than its factorization.

1665042645654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92502369211 (or 92502369208 counting only the distinct ones).

The product of its (nonzero) digits is 20736000, while the sum is 54.

The spelling of 1665042645654 in words is "one trillion, six hundred sixty-five billion, forty-two million, six hundred forty-five thousand, six hundred fifty-four".