1663855714 has 4 divisors (see below), whose sum is σ = 2495783574. Its totient is φ = 831927856.

The previous prime is 1663855709. The next prime is 1663855723. The reversal of 1663855714 is 4175583661.

It is a happy number.

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., 1364046489 + 299809225 = 36933^2 + 17315^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 415963927 + ... + 415963930.

Almost surely, 2^1663855714 is an apocalyptic number.

1663855714 is a deficient number, since it is larger than the sum of its proper divisors (831927860).

1663855714 is an equidigital number, since it uses as much as digits as its factorization.

1663855714 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831927859.

The product of its digits is 604800, while the sum is 46.

The square root of 1663855714 is about 40790.3875196105. The cubic root of 1663855714 is about 1184.9641758355.

The spelling of 1663855714 in words is "one billion, six hundred sixty-three million, eight hundred fifty-five thousand, seven hundred fourteen".