1683970664 has 8 divisors (see below), whose sum is σ = 3157445010. Its totient is φ = 841985328.

The previous prime is 1683970663. The next prime is 1683970667. The reversal of 1683970664 is 4660793861.

It can be written as a sum of positive squares in only one way, i.e., 1193702500 + 490268164 = 34550^2 + 22142^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (1683970663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105248159 + ... + 105248174.

Almost surely, 2^1683970664 is an apocalyptic number.

It is an amenable number.

1683970664 is a deficient number, since it is larger than the sum of its proper divisors (1473474346).

1683970664 is a wasteful number, since it uses less digits than its factorization.

1683970664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210496339 (or 210496335 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 50.

The square root of 1683970664 is about 41036.2116185205. The cubic root of 1683970664 is about 1189.7202138647.

The spelling of 1683970664 in words is "one billion, six hundred eighty-three million, nine hundred seventy thousand, six hundred sixty-four".