1663274963 has 24 divisors (see below), whose sum is σ = 1981389312. Its totient is φ = 1391526864.

The previous prime is 1663274939. The next prime is 1663274971. The reversal of 1663274963 is 3694723661.

It is not a de Polignac number, because 1663274963 - 2²⁴ = 1646497747 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is not an unprimeable number, because it can be changed into a prime (1663274563) 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, 1120820 + ... + 1122302.

It is an arithmetic number, because the mean of its divisors is an integer number (82557888).

Almost surely, 2^1663274963 is an apocalyptic number.

1663274963 is a deficient number, since it is larger than the sum of its proper divisors (318114349).

1663274963 is a wasteful number, since it uses less digits than its factorization.

1663274963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2031 (or 2024 counting only the distinct ones).

The product of its digits is 979776, while the sum is 47.

The square root of 1663274963 is about 40783.2681745836. The cubic root of 1663274963 is about 1184.8262934446.

The spelling of 1663274963 in words is "one billion, six hundred sixty-three million, two hundred seventy-four thousand, nine hundred sixty-three".