2663250561 has 6 divisors (see below), whose sum is σ = 3846917490. Its totient is φ = 1775500368.

The previous prime is 2663250553. The next prime is 2663250581. The reversal of 2663250561 is 1650523662.

It is a happy number.

2663250561 is a `hidden beast` number, since 2 + 66 + 32 + 5 + 0 + 561 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2662560000 + 690561 = 51600^2 + 831^2 .

It is not a de Polignac number, because 2663250561 - 2³ = 2663250553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2663250511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 147958356 + ... + 147958373.

It is an arithmetic number, because the mean of its divisors is an integer number (641152915).

Almost surely, 2^2663250561 is an apocalyptic number.

It is an amenable number.

2663250561 is a deficient number, since it is larger than the sum of its proper divisors (1183666929).

2663250561 is a wasteful number, since it uses less digits than its factorization.

2663250561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295916735 (or 295916732 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 2663250561 is about 51606.6910487390. The cubic root of 2663250561 is about 1386.1301468212.

The spelling of 2663250561 in words is "two billion, six hundred sixty-three million, two hundred fifty thousand, five hundred sixty-one".