1663842727 has 8 divisors (see below), whose sum is σ = 1696022064. Its totient is φ = 1631692608.

The previous prime is 1663842721. The next prime is 1663842767. The reversal of 1663842727 is 7272483661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1663842727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663842721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133588 + ... + 145510.

It is an arithmetic number, because the mean of its divisors is an integer number (212002758).

Almost surely, 2^1663842727 is an apocalyptic number.

1663842727 is a deficient number, since it is larger than the sum of its proper divisors (32179337).

1663842727 is a wasteful number, since it uses less digits than its factorization.

1663842727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14609.

The product of its digits is 677376, while the sum is 46.

The square root of 1663842727 is about 40790.2283273825. The cubic root of 1663842727 is about 1184.9610928017.

The spelling of 1663842727 in words is "one billion, six hundred sixty-three million, eight hundred forty-two thousand, seven hundred twenty-seven".