1684740664 has 32 divisors (see below), whose sum is σ = 3346606800. Its totient is φ = 792368640.

The previous prime is 1684740643. The next prime is 1684740727. The reversal of 1684740664 is 4660474861.

It is a super-2 number, since 2×1684740664² = 5676702209870321792, 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 7 ways as a sum of consecutive naturals, for example, 469999 + ... + 473569.

Almost surely, 2^1684740664 is an apocalyptic number.

It is an amenable number.

1684740664 is a deficient number, since it is larger than the sum of its proper divisors (1661866136).

1684740664 is a wasteful number, since it uses less digits than its factorization.

1684740664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7063 (or 7059 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 46.

The square root of 1684740664 is about 41045.5925039461. The cubic root of 1684740664 is about 1189.9015204619.

The spelling of 1684740664 in words is "one billion, six hundred eighty-four million, seven hundred forty thousand, six hundred sixty-four".