11515506066 has 24 divisors (see below), whose sum is σ = 25009543884. Its totient is φ = 3829381920.

The previous prime is 11515505993. The next prime is 11515506083. The reversal of 11515506066 is 66060551511.

It can be written as a sum of positive squares in 2 ways, for example, as 8157883041 + 3357623025 = 90321^2 + 57945^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 11515506066.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 752221 + ... + 767376.

Almost surely, 2^11515506066 is an apocalyptic number.

11515506066 is an abundant number, since it is smaller than the sum of its proper divisors (13494037818).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11515506066 is a wasteful number, since it uses less digits than its factorization.

11515506066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1520026 (or 1520023 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The spelling of 11515506066 in words is "eleven billion, five hundred fifteen million, five hundred six thousand, sixty-six".