1998676664 has 16 divisors (see below), whose sum is σ = 3762104400. Its totient is φ = 995448832.

The previous prime is 1998676663. The next prime is 1998676727. The reversal of 1998676664 is 4666768991.

It is a junction number, because it is equal to n+sod(n) for n = 1998676597 and 1998676606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998676663) 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, 484004 + ... + 488115.

It is an arithmetic number, because the mean of its divisors is an integer number (235131525).

Almost surely, 2^1998676664 is an apocalyptic number.

It is an amenable number.

1998676664 is a deficient number, since it is larger than the sum of its proper divisors (1763427736).

1998676664 is a wasteful number, since it uses less digits than its factorization.

1998676664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972382 (or 972378 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 62.

The square root of 1998676664 is about 44706.5617555186. The cubic root of 1998676664 is about 1259.6431054365.

The spelling of 1998676664 in words is "one billion, nine hundred ninety-eight million, six hundred seventy-six thousand, six hundred sixty-four".