1663434794 has 16 divisors (see below), whose sum is σ = 2890667328. Its totient is φ = 703134432.

The previous prime is 1663434793. The next prime is 1663434869. The reversal of 1663434794 is 4974343661.

It is not an unprimeable number, because it can be changed into a prime (1663434791) 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, 812792 + ... + 814835.

It is an arithmetic number, because the mean of its divisors is an integer number (180666708).

Almost surely, 2^1663434794 is an apocalyptic number.

1663434794 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1663434794 is a deficient number, since it is larger than the sum of its proper divisors (1227232534).

1663434794 is a wasteful number, since it uses less digits than its factorization.

1663434794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1627709.

The product of its digits is 1306368, while the sum is 47.

The square root of 1663434794 is about 40785.2276443322. The cubic root of 1663434794 is about 1184.8642438557.

The spelling of 1663434794 in words is "one billion, six hundred sixty-three million, four hundred thirty-four thousand, seven hundred ninety-four".