1663764129 has 6 divisors (see below), whose sum is σ = 2403214866. Its totient is φ = 1109176080.

The previous prime is 1663764107. The next prime is 1663764161. The reversal of 1663764129 is 9214673661.

1663764129 is a `hidden beast` number, since 1 + 6 + 637 + 6 + 4 + 1 + 2 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1402877025 + 260887104 = 37455^2 + 16152^2 .

It is not a de Polignac number, because 1663764129 - 2⁹ = 1663763617 is a prime.

It is a super-2 number, since 2×1663764129² = 5536222153894257282, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1663764199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 92431332 + ... + 92431349.

It is an arithmetic number, because the mean of its divisors is an integer number (400535811).

Almost surely, 2^1663764129 is an apocalyptic number.

It is an amenable number.

1663764129 is a deficient number, since it is larger than the sum of its proper divisors (739450737).

1663764129 is a wasteful number, since it uses less digits than its factorization.

1663764129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184862687 (or 184862684 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 1663764129 is about 40789.2648744740. The cubic root of 1663764129 is about 1184.9424337789.

The spelling of 1663764129 in words is "one billion, six hundred sixty-three million, seven hundred sixty-four thousand, one hundred twenty-nine".