1665045455 has 8 divisors (see below), whose sum is σ = 2001296592. Its totient is φ = 1329875008.

The previous prime is 1665045451. The next prime is 1665045491. The reversal of 1665045455 is 5545405661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1665045455 - 2² = 1665045451 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665045451) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 266777 + ... + 272946.

It is an arithmetic number, because the mean of its divisors is an integer number (250162074).

Almost surely, 2^1665045455 is an apocalyptic number.

1665045455 is a deficient number, since it is larger than the sum of its proper divisors (336251137).

1665045455 is an equidigital number, since it uses as much as digits as its factorization.

1665045455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540345.

The product of its (nonzero) digits is 360000, while the sum is 41.

The square root of 1665045455 is about 40804.9685087490. The cubic root of 1665045455 is about 1185.2465449854.

The spelling of 1665045455 in words is "one billion, six hundred sixty-five million, forty-five thousand, four hundred fifty-five".