999936664 has 16 divisors (see below), whose sum is σ = 1878903000. Its totient is φ = 498895872.

The previous prime is 999936653. The next prime is 999936673. The reversal of 999936664 is 466639999.

It is a super-2 number, since 2×999936664² = 1999746664022897792, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130089 + ... + 137560.

Almost surely, 2^999936664 is an apocalyptic number.

It is an amenable number.

999936664 is a deficient number, since it is larger than the sum of its proper divisors (878966336).

999936664 is a wasteful number, since it uses less digits than its factorization.

999936664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268122 (or 268118 counting only the distinct ones).

The product of its digits is 17006112, while the sum is 61.

The square root of 999936664 is about 31621.7751557372. The cubic root of 999936664 is about 999.9788875543.

The spelling of 999936664 in words is "nine hundred ninety-nine million, nine hundred thirty-six thousand, six hundred sixty-four".