1663265105 has 8 divisors (see below), whose sum is σ = 1996137000. Its totient is φ = 1330466176.

The previous prime is 1663265089. The next prime is 1663265119. The reversal of 1663265105 is 5015623661.

It can be written as a sum of positive squares in 4 ways, for example, as 71893441 + 1591371664 = 8479^2 + 39892^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1663265105 - 2⁴ = 1663265089 is a prime.

It is a super-2 number, since 2×1663265105² = 5532901619021322050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81581 + ... + 99909.

It is an arithmetic number, because the mean of its divisors is an integer number (249517125).

Almost surely, 2^1663265105 is an apocalyptic number.

It is an amenable number.

1663265105 is a deficient number, since it is larger than the sum of its proper divisors (332871895).

1663265105 is a wasteful number, since it uses less digits than its factorization.

1663265105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36483.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 1663265105 is about 40783.1473160177. The cubic root of 1663265105 is about 1184.8239526730.

Adding to 1663265105 its reverse (5015623661), we get a palindrome (6678888766).

The spelling of 1663265105 in words is "one billion, six hundred sixty-three million, two hundred sixty-five thousand, one hundred five".