1669006549969 has 4 divisors (see below), whose sum is σ = 1820734418160. Its totient is φ = 1517278681780.

The previous prime is 1669006549967. The next prime is 1669006550023. The reversal of 1669006549969 is 9699456009661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1669006549969 - 2¹ = 1669006549967 is a prime.

It is a super-2 number, since 2×1669006549969² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1669006549898 and 1669006549907.

It is not an unprimeable number, because it can be changed into a prime (1669006549967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75863934079 + ... + 75863934100.

It is an arithmetic number, because the mean of its divisors is an integer number (455183604540).

Almost surely, 2^{1669006549969} is an apocalyptic number.

It is an amenable number.

1669006549969 is a deficient number, since it is larger than the sum of its proper divisors (151727868191).

1669006549969 is a wasteful number, since it uses less digits than its factorization.

1669006549969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151727868190.

The product of its (nonzero) digits is 170061120, while the sum is 70.

The spelling of 1669006549969 in words is "one trillion, six hundred sixty-nine billion, six million, five hundred forty-nine thousand, nine hundred sixty-nine".