1669066465499 has 8 divisors (see below), whose sum is σ = 1677155768592. Its totient is φ = 1660978851840.

The previous prime is 1669066465441. The next prime is 1669066465513. The reversal of 1669066465499 is 9945646609661.

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 1669066465499 - 2²⁰ = 1669065416923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1669066465799) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1581287 + ... + 2416319.

It is an arithmetic number, because the mean of its divisors is an integer number (209644471074).

Almost surely, 2^{1669066465499} is an apocalyptic number.

1669066465499 is a deficient number, since it is larger than the sum of its proper divisors (8089303093).

1669066465499 is an equidigital number, since it uses as much as digits as its factorization.

1669066465499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844717.

The product of its (nonzero) digits is 453496320, while the sum is 71.

The spelling of 1669066465499 in words is "one trillion, six hundred sixty-nine billion, sixty-six million, four hundred sixty-five thousand, four hundred ninety-nine".