998370664 has 32 divisors (see below), whose sum is σ = 1919925000. Its totient is φ = 486420480.

The previous prime is 998370647. The next prime is 998370691. The reversal of 998370664 is 466073899.

It can be written as a sum of positive squares in 4 ways, for example, as 809857764 + 188512900 = 28458^2 + 13730^2 .

It is a super-3 number, since 3×998370664³ (a number of 28 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 408454 + ... + 410890.

Almost surely, 2^998370664 is an apocalyptic number.

998370664 is the 19984-th heptagonal number.

It is an amenable number.

998370664 is a deficient number, since it is larger than the sum of its proper divisors (921554336).

998370664 is a wasteful number, since it uses less digits than its factorization.

998370664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3733 (or 3729 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 52.

The square root of 998370664 is about 31597.0040351930. The cubic root of 998370664 is about 999.4565927621.

The spelling of 998370664 in words is "nine hundred ninety-eight million, three hundred seventy thousand, six hundred sixty-four".