1683664408 has 32 divisors (see below), whose sum is σ = 3206124000. Its totient is φ = 828741888.

The previous prime is 1683664387. The next prime is 1683664421. The reversal of 1683664408 is 8044663861.

It is a congruent number.

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, 347410 + ... + 352222.

It is an arithmetic number, because the mean of its divisors is an integer number (100191375).

Almost surely, 2^1683664408 is an apocalyptic number.

It is an amenable number.

1683664408 is a deficient number, since it is larger than the sum of its proper divisors (1522459592).

1683664408 is a wasteful number, since it uses less digits than its factorization.

1683664408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5491 (or 5487 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 46.

The square root of 1683664408 is about 41032.4799153061. The cubic root of 1683664408 is about 1189.6480865108.

The spelling of 1683664408 in words is "one billion, six hundred eighty-three million, six hundred sixty-four thousand, four hundred eight".