1669006549898 has 4 divisors (see below), whose sum is σ = 2503509824850. Its totient is φ = 834503274948.

The previous prime is 1669006549823. The next prime is 1669006549967. The reversal of 1669006549898 is 8989456009661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1649408509849 + 19598040049 = 1284293^2 + 139993^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 417251637473 + ... + 417251637476.

Almost surely, 2^{1669006549898} is an apocalyptic number.

1669006549898 is a deficient number, since it is larger than the sum of its proper divisors (834503274952).

1669006549898 is an equidigital number, since it uses as much as digits as its factorization.

1669006549898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 834503274951.

The product of its (nonzero) digits is 201553920, while the sum is 71.

The spelling of 1669006549898 in words is "one trillion, six hundred sixty-nine billion, six million, five hundred forty-nine thousand, eight hundred ninety-eight".