1663853914 has 4 divisors (see below), whose sum is σ = 2495780874. Its totient is φ = 831926956.

The previous prime is 1663853897. The next prime is 1663853929. The reversal of 1663853914 is 4193583661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1146973689 + 516880225 = 33867^2 + 22735^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 415963477 + ... + 415963480.

Almost surely, 2^1663853914 is an apocalyptic number.

1663853914 is a deficient number, since it is larger than the sum of its proper divisors (831926960).

1663853914 is an equidigital number, since it uses as much as digits as its factorization.

1663853914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831926959.

The product of its digits is 466560, while the sum is 46.

The square root of 1663853914 is about 40790.3654555828. The cubic root of 1663853914 is about 1184.9637485275.

The spelling of 1663853914 in words is "one billion, six hundred sixty-three million, eight hundred fifty-three thousand, nine hundred fourteen".