1663916469 has 16 divisors (see below), whose sum is σ = 2337374400. Its totient is φ = 1049970816.

The previous prime is 1663916461. The next prime is 1663916473. The reversal of 1663916469 is 9646193661.

It is not a de Polignac number, because 1663916469 - 2³ = 1663916461 is a prime.

It is a super-2 number, since 2×1663916469² = 5537236031618855922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663916461) 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 15 ways as a sum of consecutive naturals, for example, 55767 + ... + 80235.

It is an arithmetic number, because the mean of its divisors is an integer number (146085900).

Almost surely, 2^1663916469 is an apocalyptic number.

1663916469 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1663916469 is a deficient number, since it is larger than the sum of its proper divisors (673457931).

1663916469 is a wasteful number, since it uses less digits than its factorization.

1663916469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25684.

The product of its digits is 1259712, while the sum is 51.

The square root of 1663916469 is about 40791.1322348375. The cubic root of 1663916469 is about 1184.9785984847.

The spelling of 1663916469 in words is "one billion, six hundred sixty-three million, nine hundred sixteen thousand, four hundred sixty-nine".