1666280050505 has 8 divisors (see below), whose sum is σ = 2285184069312. Its totient is φ = 1142592034608.

The previous prime is 1666280050493. The next prime is 1666280050517. The reversal of 1666280050505 is 5050500826661.

It is an interprime number because it is at equal distance from previous prime (1666280050493) and next prime (1666280050517).

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 1666280050505 - 2¹⁴ = 1666280034121 is a prime.

It is a Duffinian 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, 23804000687 + ... + 23804000756.

It is an arithmetic number, because the mean of its divisors is an integer number (285648008664).

Almost surely, 2^{1666280050505} is an apocalyptic number.

It is an amenable number.

1666280050505 is a deficient number, since it is larger than the sum of its proper divisors (618904018807).

1666280050505 is an equidigital number, since it uses as much as digits as its factorization.

1666280050505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47608001455.

The product of its (nonzero) digits is 432000, while the sum is 44.

The spelling of 1666280050505 in words is "one trillion, six hundred sixty-six billion, two hundred eighty million, fifty thousand, five hundred five".