1663893511 has 8 divisors (see below), whose sum is σ = 1903466880. Its totient is φ = 1424788728.

The previous prime is 1663893503. The next prime is 1663893533. The reversal of 1663893511 is 1153983661.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1663893511 - 2³ = 1663893503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663893541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109501 + ... + 123766.

It is an arithmetic number, because the mean of its divisors is an integer number (237933360).

Almost surely, 2^1663893511 is an apocalyptic number.

1663893511 is a deficient number, since it is larger than the sum of its proper divisors (239573369).

1663893511 is a wasteful number, since it uses less digits than its factorization.

1663893511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234293.

The product of its digits is 116640, while the sum is 43.

The square root of 1663893511 is about 40790.8508246641. The cubic root of 1663893511 is about 1184.9731485189.

The spelling of 1663893511 in words is "one billion, six hundred sixty-three million, eight hundred ninety-three thousand, five hundred eleven".