1663550331 has 16 divisors (see below), whose sum is σ = 2275553280. Its totient is φ = 1080424800.

The previous prime is 1663550299. The next prime is 1663550347. The reversal of 1663550331 is 1330553661.

It is not a de Polignac number, because 1663550331 - 2⁵ = 1663550299 is a prime.

It is a super-2 number, since 2×1663550331² = 5534799407540419122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1663550292 and 1663550301.

It is not an unprimeable number, because it can be changed into a prime (1663550131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33606 + ... + 66756.

It is an arithmetic number, because the mean of its divisors is an integer number (142222080).

Almost surely, 2^1663550331 is an apocalyptic number.

1663550331 is a deficient number, since it is larger than the sum of its proper divisors (612002949).

1663550331 is a wasteful number, since it uses less digits than its factorization.

1663550331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33586.

The product of its (nonzero) digits is 24300, while the sum is 33.

The square root of 1663550331 is about 40786.6440271813. The cubic root of 1663550331 is about 1184.8916755473.

It can be divided in two parts, 16635 and 50331, that added together give a palindrome (66966).

The spelling of 1663550331 in words is "one billion, six hundred sixty-three million, five hundred fifty thousand, three hundred thirty-one".