1664998334998 has 4 divisors (see below), whose sum is σ = 2497497502500. Its totient is φ = 832499167498.

The previous prime is 1664998334969. The next prime is 1664998334999. The reversal of 1664998334998 is 8994338994661.

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

It is a super-3 number, since 3×1664998334998³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664998334999) by changing a digit.

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, 416249583748 + ... + 416249583751.

It is an arithmetic number, because the mean of its divisors is an integer number (624374375625).

Almost surely, 2^{1664998334998} is an apocalyptic number.

1664998334998 is a deficient number, since it is larger than the sum of its proper divisors (832499167502).

1664998334998 is an equidigital number, since it uses as much as digits as its factorization.

1664998334998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832499167501.

The product of its digits is 2176782336, while the sum is 79.

The spelling of 1664998334998 in words is "one trillion, six hundred sixty-four billion, nine hundred ninety-eight million, three hundred thirty-four thousand, nine hundred ninety-eight".