1670666998 has 128 divisors (see below), whose sum is σ = 3576545280. Its totient is φ = 563656320.

The previous prime is 1670666947. The next prime is 1670666999. The reversal of 1670666998 is 8996660761.

It is a super-2 number, since 2×1670666998² = 5582256436412664008, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1670666999) 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 in 63 ways as a sum of consecutive naturals, for example, 6352215 + ... + 6352477.

It is an arithmetic number, because the mean of its divisors is an integer number (27941760).

Almost surely, 2^1670666998 is an apocalyptic number.

1670666998 is an abundant number, since it is smaller than the sum of its proper divisors (1905878282).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1670666998 is a wasteful number, since it uses less digits than its factorization.

1670666998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482.

The product of its (nonzero) digits is 5878656, while the sum is 58.

The square root of 1670666998 is about 40873.7935357119. The cubic root of 1670666998 is about 1186.5789270265.

The spelling of 1670666998 in words is "one billion, six hundred seventy million, six hundred sixty-six thousand, nine hundred ninety-eight".