1665404243435 has 8 divisors (see below), whose sum is σ = 1999026562416. Its totient is φ = 1331962414560.

The previous prime is 1665404243383. The next prime is 1665404243471. The reversal of 1665404243435 is 5343424045661.

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

It is not a de Polignac number, because 1665404243435 - 2⁸ = 1665404243179 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1665404243435.

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, 45102224 + ... + 45139133.

It is an arithmetic number, because the mean of its divisors is an integer number (249878320302).

Almost surely, 2^{1665404243435} is an apocalyptic number.

1665404243435 is a deficient number, since it is larger than the sum of its proper divisors (333622318981).

1665404243435 is an equidigital number, since it uses as much as digits as its factorization.

1665404243435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90245053.

The product of its (nonzero) digits is 4147200, while the sum is 47.

The spelling of 1665404243435 in words is "one trillion, six hundred sixty-five billion, four hundred four million, two hundred forty-three thousand, four hundred thirty-five".