1663019406 has 48 divisors (see below), whose sum is σ = 3628825200. Its totient is φ = 550416384.

The previous prime is 1663019401. The next prime is 1663019411. The reversal of 1663019406 is 6049103661.

1663019406 is a `hidden beast` number, since 1 + 6 + 630 + 19 + 4 + 0 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (1663019401) and next prime (1663019411).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663019401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2162190 + ... + 2162958.

It is an arithmetic number, because the mean of its divisors is an integer number (75600525).

Almost surely, 2^1663019406 is an apocalyptic number.

1663019406 is an abundant number, since it is smaller than the sum of its proper divisors (1965805794).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1663019406 is a wasteful number, since it uses less digits than its factorization.

1663019406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1473 (or 1470 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 1663019406 is about 40780.1349433765. The cubic root of 1663019406 is about 1184.7656087174.

The spelling of 1663019406 in words is "one billion, six hundred sixty-three million, nineteen thousand, four hundred six".